| FinalID | CommonName | CaliforniaTaxon | Phylum | Subphylum | Superclass | Class | Subclass | Superorder | Order | Suborder | Superfamily | Family | Subfamily | Tribe | GenusComplex | Genus | SpeciesComplex | Species | Subspecies | Variety | TaxonomicAuthority | FinalIDAuthority | Source |
| Abedus | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | | | | Stal | SAFIT | DFG-ABL |
| Abedus breviceps | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus breviceps | | | Stal | SAFIT | DFG-ABL |
| Abedus herberti | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus herberti | | | Hidalgo | SAFIT | DFG-ABL |
| Abedus indentatus | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus indentatus | | | (Haldeman) | SAFIT | DFG-ABL |
| Abedus ovatus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus ovatus | | | Stal | SAFIT | DFG-ABL |
| Abedus parkeri | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus parkeri | | | Menke | SAFIT | DFG-ABL |
| Abedus vicinus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus vicinus | | | Mayr | SAFIT | DFG-ABL |
| Ablabesmyia | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneurini | | Ablabesmyia | | | | | Johannsen | SAFIT | DFG-ABL |
| Ablabesmyia annulata | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia annulata | | | (Say) | SAFIT | DFG-ABL |
| Ablabesmyia aspera | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia aspera | | | (Roback) | SAFIT | DFG-ABL |
| Ablabesmyia cinctipes | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia cinctipes | | | (Johannsen) | SAFIT | DFG-ABL |
| Ablabesmyia mallochi | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia mallochi | | | (Walley) | SAFIT | DFG-ABL |
| Ablabesmyia monilis | | False | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia monilis | | | (Linnaeus) | SAFIT | DFG-ABL |
| Ablabesmyia peleensis | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia peleensis | | | (Walley) | SAFIT | DFG-ABL |
| Ablabesmyia pulchripennis | | False | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia pulchripennis | | | (Lundbeck) | SAFIT | DFG-ABL |
| Acalyptonotidae | | False | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Acalyptonotidae | | | | | | | | | Walter | SAFIT | DFG-ABL |
| Acalyptonotus | | False | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Acalyptonotidae | | | | Acalyptonotus | | | | | Acalyptonotus Walter, 1911 | SAFIT | DFG-ABL |
| Acalyptonotus pacificus | | False | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Acalyptonotidae | | | | Acalyptonotus | | Acalyptonotus pacificus | | | Smith | SAFIT | DFG-ABL |
| Acanthomysis | | True | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Acanthomysis | | | | | Czerniavsky | SAFIT | DFG-ABL |
| Acanthomysis aspera | | True | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Acanthomysis | | Acanthomysis aspera | | | Ii | SAFIT | DFG-ABL |
| Acanthomysis hwanhaiensis | | True | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Acanthomysis | | Acanthomysis hwanhaiensis | | | Ii | SAFIT | DFG-ABL |
| Acari | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | | | | | | | | | | | | | Leach | SAFIT | DFG-ABL |
| Acentrella | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acentrella | | | | | Bengtsson | SAFIT | DFG-ABL |
| Acentrella insignificans | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acentrella | | Acentrella insignificans | | | (McDunnough) | SAFIT | DFG-ABL |
| Acentrella turbida | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acentrella | | Acentrella turbida | | | (McDunnough) | SAFIT | DFG-ABL |
| Acerpenna | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | | | | Waltz and McCafferty | SAFIT | DFG-ABL |
| Acerpenna pygmaea | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | Acerpenna pygmaea | | | (Hagen) | SAFIT | DFG-ABL |
| Acerpenna sulfurosus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | Acerpenna sulfurosus | | | (Day) | SAFIT | DFG-ABL |
| Acerpenna thermophilus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | Acerpenna thermophilus | | | | SAFIT | DFG-ABL |
| Aciculata | | True | Annelida | Aclitellata | | Polychaeta | Palpata | | Aciculata | | | | | | | | | | | | Rouse and Fauchald | SAFIT | DFG-ABL |
| Acilius | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Dytiscinae | | | Acilius | | | | | Leach | SAFIT | DFG-ABL |
| Acilius abbreviatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Dytiscinae | | | Acilius | | Acilius abbreviatus | | | Mannerheim | SAFIT | DFG-ABL |
| Aclitellata | | True | Annelida | Aclitellata | | | | | | | | | | | | | | | | | | SAFIT | DFG-ABL |
| Acneus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | | | | Horn | SAFIT | DFG-ABL |
| Acneus beeri | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus beeri | | | Hatch | SAFIT | DFG-ABL |
| Acneus burnelli | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus burnelli | | | (Fender) | SAFIT | DFG-ABL |
| Acneus oregonensis | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus oregonensis | | | Fender | SAFIT | DFG-ABL |
| Acneus quadrimaculatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus quadrimaculatus | | | Horn | SAFIT | DFG-ABL |
| Acricotopus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Orthocladiinae | | | Acricotopus | | | | | Kieffer | SAFIT | DFG-ABL |
| Acromegalomma | | False | Annelida | | | Polychaeta | Sedentaria | | Sabellida | | | Sabellidae | | | | Acromegalomma | | | | | Gil & Nishi, 2017 | SAFIT | DFW-ABL |
| Acromegalomma pigmentum | | False | Annelida | | | Polychaeta | Sedentaria | | Sabellida | | | Sabellidae | | | | Acromegalomma | | Acromegalomma pigmentum | | | (Reish, 1963) | SAFIT | DFW-ABL |
| Adenophorea | | True | Nematoda | | | Adenophorea | | | | | | | | | | | | | | | | SAFIT | DFG-ABL |
| Adephaga | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Adephaga | | | | | | | | | | | Schellenberg, 1806 | SAFIT | DFW-ABL |
| Aedes | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | | | | Meigen | SAFIT | DFG-ABL |
| Aedes aegypti | | False | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | Aedes aegypti | | | (Linneaus) | SAFIT | DFG-ABL |
| Aedes cinereus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | Aedes cinereus | | | Meigen | SAFIT | DFG-ABL |
| Aedes vexans | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | Aedes vexans | | | (Meigen) | SAFIT | DFG-ABL |
| Aeolosoma | | True | Annelida | Aclitellata | | Polychaeta | Scolecida | | | | | Aeolosomatidae | | | | Aeolosoma | | | | | Ehrenberg | SAFIT | DFG-ABL |
| Aeolosomatidae | | True | Annelida | Aclitellata | | Polychaeta | Scolecida | | | | | Aeolosomatidae | | | | | | | | | Beddard | SAFIT | DFG-ABL |
| Aeshna | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | | | | Fabricius | SAFIT | DFG-ABL |
| Aeshna canadensis | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna canadensis | | | Walker | SAFIT | DFG-ABL |
| Aeshna constricta | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna constricta | | | Say | SAFIT | DFG-ABL |
| Aeshna eremita | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna eremita | | | Scudder | SAFIT | DFG-ABL |
| Aeshna interrupta | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna interrupta | | | Walker | SAFIT | DFG-ABL |
| Aeshna juncea | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna juncea | | | (Linnaeus) | SAFIT | DFG-ABL |
| Aeshna palmata | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna palmata | | | Hagen | SAFIT | DFG-ABL |
| Aeshna persephone | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna persephone | | | Donnelly | SAFIT | DFG-ABL |
| Aeshna subarctica | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna subarctica | | | Walker | SAFIT | DFG-ABL |
| Aeshna tuberculifera | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna tuberculifera | | | Walker | SAFIT | DFG-ABL |
| Aeshna umbrosa | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna umbrosa | | | Walker | SAFIT | DFG-ABL |
| Aeshna walkeri | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna walkeri | | | Kennedy | SAFIT | DFG-ABL |
| Aeshna/ Rhionaeshna | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | | | | | | Fabricius/ von Ellenrieder | SAFIT | DFG-ABL |
| Aeshnidae | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | | | | | | | Selys | SAFIT | DFG-ABL |
| Afghanurus | | False | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | | | | Demoulin, 1964 | SAFIT | DFW-ABL |
| Afghanurus criddlei | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | Afghanurus criddlei | | | (McDunnough, 1927) | SAFIT | DFW-ABL |
| Afghanurus kennedyi | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | Afghanurus kennedyi | | | (McDunnough, 1924) | SAFIT | DFW-ABL |
| Afghanurus simplicioides | | False | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | Afghanurus simplicioides | | | (McDunnough, 1924) | SAFIT | DFW-ABL |
| Agabinae | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Adephaga | | Dytiscidae | Agabinae | | | | | | | | Thomson, 1867 | SAFIT | DFW-ABL |
| Agabini | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Adephaga | | Dytiscidae | Agabinae | Agabini | | | | | | | Thomson, 1867 | SAFIT | DFW-ABL |
| Agabinus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabinus | | | | | Crotch | SAFIT | DFG-ABL |
| Agabinus glabrellus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabinus | | Agabinus glabrellus | | | (Motschulsky) | SAFIT | DFG-ABL |
| Agabinus sculpturellus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabinus | | Agabinus sculpturellus | | | Zimermann | SAFIT | DFG-ABL |
| Agabus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | | | | Leach | SAFIT | DFG-ABL |
| Agabus ambiguus | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus ambiguus | | | (Say) | SAFIT | DFG-ABL |
| Agabus ancillus | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus ancillus | | | Fall | SAFIT | DFG-ABL |
| Agabus anthracinus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus anthracinus | | | Mannerheim | SAFIT | DFG-ABL |
| Agabus apache | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus apache | | | Young | SAFIT | DFG-ABL |
| Agabus approximatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus approximatus | | | Fall | SAFIT | DFG-ABL |
| Agabus austinii | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus austinii | | | Sharp | SAFIT | DFG-ABL |
| Agabus austrodiscors | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus austrodiscors | | | Larson | SAFIT | DFG-ABL |
| Agabus bifarius | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus bifarius | | | (Kirby) | SAFIT | DFG-ABL |
| Agabus bjorkmanae | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus bjorkmanae | | | Hatch | SAFIT | DFG-ABL |
| Agabus brevicollis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus brevicollis | | | LeConte | SAFIT | DFG-ABL |
| Agabus canadensis | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus canadensis | | | Fall | SAFIT | DFG-ABL |
| Agabus confertus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus confertus | | | LeConte | SAFIT | DFG-ABL |
| Agabus cordatus | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus cordatus | | | (LeConte) | SAFIT | DFG-ABL |
| Agabus discors | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus discors | | | LeConte | SAFIT | DFG-ABL |
| Agabus disintegratus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus disintegratus | | | (Crotch) | SAFIT | DFG-ABL |
| Agabus erichsoni | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus erichsoni | | | Gemminger and Harold | SAFIT | DFG-ABL |
| Agabus euryomus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus euryomus | | | Larson | SAFIT | DFG-ABL |
| Agabus griseipennis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus griseipennis | | | LeConte | SAFIT | DFG-ABL |
| Agabus hoppingi | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus hoppingi | | | Leech | SAFIT | DFG-ABL |
| Agabus hypomelas | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus hypomelas | | | Mannerheim | SAFIT | DFG-ABL |
| Agabus ilybiiformis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus ilybiiformis | | | (Zimmermann) | SAFIT | DFG-ABL |
| Agabus jimzim | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus jimzim | | | Larson | SAFIT | DFG-ABL |
| Agabus klamathensis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus klamathensis | | | Larson & Leech | SAFIT | DFG-ABL |
| Agabus kootenai | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus kootenai | | | Larson | SAFIT | DFG-ABL |
| Agabus lineelus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus lineelus | | | LeConte | SAFIT | DFG-ABL |
| Agabus lugens | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus lugens | | | LeConte | SAFIT | DFG-ABL |
| Agabus lutosus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus lutosus | | | LeConte | SAFIT | DFG-ABL |
| Agabus minnesotensis | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus minnesotensis | | | Wallis | SAFIT | DFG-ABL |
| Agabus morosus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus morosus | | | LeConte | SAFIT | DFG-ABL |
| Agabus obliteratus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus obliteratus | | | LeConte | SAFIT | DFG-ABL |
| Agabus oblongulus | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus oblongulus | | | Fall | SAFIT | DFG-ABL |
| Agabus obsoletus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus obsoletus | | | LeConte | SAFIT | DFG-ABL |
| Agabus pandurus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus pandurus | | | Leech | SAFIT | DFG-ABL |
| Agabus perplexus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus perplexus | | | Sharp | SAFIT | DFG-ABL |
| Agabus pisobius | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus pisobius | | | Leech | SAFIT | DFG-ABL |
| Agabus punctulatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus punctulatus | | | Aube | SAFIT | DFG-ABL |
| Agabus regularis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus regularis | | | LeConte | SAFIT | DFG-ABL |
| Agabus roguus | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus roguus | | | Larson | SAFIT | DFG-ABL |
| Agabus rumppi | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus rumppi | | | Leech | SAFIT | DFG-ABL |
| Agabus sasquatch | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus sasquatch | | | Larson | SAFIT | DFG-ABL |
| Agabus semipunctatus | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus semipunctatus | | | (Kirby) | SAFIT | DFG-ABL |
| Agabus semivittatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus semivittatus | | | LeConte | SAFIT | DFG-ABL |
| Agabus seriatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus seriatus | | | (Say) | SAFIT | DFG-ABL |
| Agabus smithi | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus smithi | | | Brown | SAFIT | DFG-ABL |
| Agabus strigulosus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus strigulosus | | | (Crotch) | SAFIT | DFG-ABL |
| Agabus tristis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus tristis | | | Aubé | SAFIT | DFG-ABL |
| Agabus vancouverensis | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus vancouverensis | | | Leech | SAFIT | DFG-ABL |
| Agabus vandykei | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus vandykei | | | Leech | SAFIT | DFG-ABL |
| Agabus versimilis | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus versimilis | | | Brown | SAFIT | DFG-ABL |
| Agabus walsinghami | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus walsinghami | | | (Crotch) | SAFIT | DFG-ABL |
| Agapetus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | | | | Curtis | SAFIT | DFG-ABL |
| Agapetus arcita | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus arcita | | | Denning | SAFIT | DFG-ABL |
| Agapetus bifidus | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus bifidus | | | Denning | SAFIT | DFG-ABL |
| Agapetus boulderensis | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus boulderensis | | | Milne | SAFIT | DFG-ABL |
| Agapetus celatus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus celatus | | | MacLachlan | SAFIT | DFG-ABL |
| Agapetus cornutus | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus cornutus | | | Denning | SAFIT | DFG-ABL |
| Agapetus denningi | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus denningi | | | Ross | SAFIT | DFG-ABL |
| Agapetus joannia | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus joannia | | | Denning | SAFIT | DFG-ABL |
| Agapetus malleatus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus malleatus | | | Banks | SAFIT | DFG-ABL |
| Agapetus marlo | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus marlo | | | Milne | SAFIT | DFG-ABL |
| Agapetus occidentis | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus occidentis | | | Denning | SAFIT | DFG-ABL |
| Agapetus orosus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus orosus | | | Denning | SAFIT | DFG-ABL |
| Agapetus taho | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus taho | | | Ross | SAFIT | DFG-ABL |
| Agasicles | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Chrysomelidae | | | | Agasicles | | | | | | SAFIT | DFG-ABL |
| Agasicles hygrophila | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Chrysomelidae | | | | Agasicles | | Agasicles hygrophila | | | | SAFIT | DFG-ABL |
| Agathon | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | | | | Röder | SAFIT | DFG-ABL |
| Agathon arizonica | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon arizonica | | | (Alexander) | SAFIT | DFG-ABL |
| Agathon aylmeri | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon aylmeri | | | (Garrett) | SAFIT | DFG-ABL |
| Agathon aylmeri group | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | | | | | SAFIT | DFG-ABL |
| Agathon comstocki | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | Agathon comstocki | | | (Kellogg) | SAFIT | DFG-ABL |
| Agathon dismalea | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon dismalea | | | (Hogue) | SAFIT | DFG-ABL |
| Agathon doanei | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | Agathon doanei | | | (Kellogg) | SAFIT | DFG-ABL |
| Agathon elegantulus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | Agathon elegantulus | | | von Röder | SAFIT | DFG-ABL |
| Agathon markii | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon markii | | | (Garrett) | SAFIT | DFG-ABL |
| Agathon sequoiarum | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon sequoiarum | | | (Alexander) | SAFIT | DFG-ABL |
| Agna | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Polyphaga | | Hydrophilidae | Sphaeridiinae | Megasternini | | Agna | | | | | Smetana, 1978 | SAFIT | DFW-ABL |
| Agna capillata | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Polyphaga | | Hydrophilidae | Sphaeridiinae | Megasternini | | Agna | | Agna capillata | | | (LeConte, 1855) | SAFIT | DFW-ABL |
| Agraylea | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Agraylea | | | | | Curtis | SAFIT | DFG-ABL |
| Agraylea multipunctata | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Agraylea | | Agraylea multipunctata | | | Curtis | SAFIT | DFG-ABL |
| Agraylea saltesea | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Agraylea | | Agraylea saltesea | | | Ross | SAFIT | DFG-ABL |
| Agrypnia | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | | | | Curtis | SAFIT | DFG-ABL |
| Agrypnia dextra | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia dextra | | | Ross | SAFIT | DFG-ABL |
| Agrypnia glacialis | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia glacialis | | | Hagen | SAFIT | DFG-ABL |
| Agrypnia improba | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia improba | | | (Hagen) | SAFIT | DFG-ABL |
| Agrypnia pagetana | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia pagetana | | | Curis | SAFIT | DFG-ABL |
| Agrypnia vestita | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia vestita | | | (Walker) | SAFIT | DFG-ABL |
| Albertathyas | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hydryphantidae | | | | Albertathyas | | | | | Smith and Cook, 1998 | SAFIT | DFW-ABL |
| Albia | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Axonopsidae | | | | Albia | | | | | | SAFIT | DFG-ABL |
| Alienacanthomysis | | True | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Alienacanthomysis | | | | | Holmquist | SAFIT | DFG-ABL |
| Alienacanthomysis macropsis | | True | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Alienacanthomysis | | Alienacanthomysis macropsis | | | Tattersall | SAFIT | DFG-ABL |
| Alisotrichia | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Alisotrichia | | | | | Flint | SAFIT | DFG-ABL |
| Alisotrichia arizonica | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Alisotrichia | | Alisotrichia arizonica | | | (Blickle & Denning) | SAFIT | DFG-ABL |
| Alitta | | True | Annelida | | | Polychaeta | Errantia | | Phyllodocida | | | Nereididae | | | | Alitta | | | | | Kinberg, 1865 | SAFIT | DFW-ABL |
| Alitta succinea | | True | Annelida | | | Polychaeta | Errantia | | Phyllodocida | | | Nereididae | | | | Alitta | | Alitta succinea | | | (Leuckart, 1847) | SAFIT | DFW-ABL |
| Allocosmoecus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Allocosmoecus | | | | | Banks | SAFIT | DFG-ABL |
| Allocosmoecus partitus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Allocosmoecus | | Allocosmoecus partitus | | | Banks | SAFIT | DFG-ABL |
| Allomyia | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | | | | Banks | SAFIT | DFG-ABL |
| Allomyia acanthis | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia acanthis | | | (Ross) | SAFIT | DFG-ABL |
| Allomyia cascadis | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia cascadis | | | (Ross) | SAFIT | DFG-ABL |
| Allomyia cidoipes | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia cidoipes | | | (Schmid) | SAFIT | DFG-ABL |
| Allomyia picoides | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Trichoptera | Integrapalpia | | Apataniidae | | | | Allomyia | | Allomyia picoides | | | (Ross, 1950) | SAFIT | DFW-ABL |
| Allomyia renoa | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia renoa | | | (Milne) | SAFIT | DFG-ABL |
| Allomyia tripunctata | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia tripunctata | | | (Banks) | SAFIT | DFG-ABL |
| Alloperla | | True | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | | | | Banks | SAFIT | DFG-ABL |
| Alloperla chandleri | | True | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla chandleri | | | Jewett | SAFIT | DFG-ABL |
| Alloperla delicata | | True | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla delicata | | | Frison | SAFIT | DFG-ABL |
| Alloperla elevata | | True | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla elevata | | | Frison | SAFIT | DFG-ABL |
| Alloperla fraterna | | True | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla fraterna | | | Frison | SAFIT | DFG-ABL |
| Alloperla serrata | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla serrata | | | Needham and Claassen | SAFIT | DFG-ABL |
| Alloperla severa | | True | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla severa | | | (Hagen) | SAFIT | DFG-ABL |
| Alloperla thalia | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla thalia | | | Ricker | SAFIT | DFG-ABL |
| Allotrichoma | | False | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Ephydridae | | | | Allotrichoma | | | | | Becker | SAFIT | DFG-ABL |
| Alluaudomyia | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Ceratopogonidae | Ceratopogoninae | | | Alluaudomyia | | | | | Kieffer | SAFIT | DFG-ABL |
| Alona | | True | Arthropoda | Crustacea | | Branchiopoda | | | Cladocera | | | Chydoridae | | | | Alona | | | | | | SAFIT | DFG-ABL |
| Alotanypus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Alotanypus | | | | | Roback | SAFIT | DFG-ABL |
| Alotanypus venustus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Alotanypus | | Alotanypus venustus | | | (Coquillett) | SAFIT | DFG-ABL |
| Altmanella | | True | Annelida | | | Clitellata | Oligochaeta | | Lumbriculida | | | Lumbriculidae | | | | Altmanella | | | | | Fend, 2009 | SAFIT | DFW-ABL |
| Altmanella freidris | | True | Annelida | | | Clitellata | Oligochaeta | | Lumbriculida | | | Lumbriculidae | | | | Altmanella | | Altmanella freidris | | | (Cook, 1966) | SAFIT | DFW-ABL |
| Amaeana | | False | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Terebellidae | | | | Amaeana | | | | | Hartman, 1959 | SAFIT | DFW-ABL |
| Ambrysus | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | | | | Stal | SAFIT | DFG-ABL |
| Ambrysus amargosus | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus amargosus | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus arizonus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus arizonus | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus californicus | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus californicus | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus circumcinctus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus circumcinctus | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus funebris | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus funebris | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus melanopterus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus melanopterus | | | Stal | SAFIT | DFG-ABL |
| Ambrysus mormon | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus mormon | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus occidentalis | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus occidentalis | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus pudicus | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Hemiptera | Heteroptera | Nepomorpha | Naucoridae | Ambrysinae | | | Ambrysus | | Ambrysus pudicus | | | Stal, 1862 | SAFIT | DFW-ABL |
| Ambrysus pulchellus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus pulchellus | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus puncticollis | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus puncticollis | | | Stal | SAFIT | DFG-ABL |
| Ambrysus relictus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus relictus | | | Polhemus and Polhemus | SAFIT | DFG-ABL |
| Ambrysus thermarum | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus thermarum | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus woodburyi | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus woodburyi | | | Usinger | SAFIT | DFG-ABL |
| Ameletidae | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | | | | | | McCafferty | SAFIT | DFG-ABL |
| Ameletus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | | | | Eaton | SAFIT | DFG-ABL |
| Ameletus amador | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus amador | | | Mayo | SAFIT | DFG-ABL |
| Ameletus andersoni | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus andersoni | | | Zloty | SAFIT | DFG-ABL |
| Ameletus bellulus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus bellulus | | | Zloty | SAFIT | DFG-ABL |
| Ameletus celer | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus celer | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus cooki | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus cooki | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus dissitus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus dissitus | | | Eaton | SAFIT | DFG-ABL |
| Ameletus doddsianus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus doddsianus | | | Zloty | SAFIT | DFG-ABL |
| Ameletus edmundsi | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus edmundsi | | | Zloty | SAFIT | DFG-ABL |
| Ameletus exquisitus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus exquisitus | | | Eaton | SAFIT | DFG-ABL |
| Ameletus falsus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus falsus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus imbellis | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus imbellis | | | Day | SAFIT | DFG-ABL |
| Ameletus majusculus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus majusculus | | | Zloty | SAFIT | DFG-ABL |
| Ameletus minumus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus minumus | | | Zloty and Harper | SAFIT | DFG-ABL |
| Ameletus oregonensis | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus oregonensis | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus pritchardi | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus pritchardi | | | Zloty | SAFIT | DFG-ABL |
| Ameletus quadratus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus quadratus | | | Zloty and Harper | SAFIT | DFG-ABL |
| Ameletus shepardi | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus shepardi | | | Traver | SAFIT | DFG-ABL |
| Ameletus similior | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus similior | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus sparsatus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus sparsatus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus subnotatus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus subnotatus | | | Eaton | SAFIT | DFG-ABL |
| Ameletus suffusus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus suffusus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus tolae | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus tolae | | | Zloty | SAFIT | DFG-ABL |
| Ameletus validus | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus validus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus vancouverensis | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus vancouverensis | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus velox | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus velox | | | Dodds | SAFIT | DFG-ABL |
| Ameletus vernalis | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus vernalis | | | McDunnough | SAFIT | DFG-ABL |
| Americorophium | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | | | | Bousfield and Hoover | SAFIT | DFG-ABL |
| Americorophium brevis | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium brevis | | | (Shoemaker, 1949) | SAFIT | DFW-ABL |
| Americorophium lacustre | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium lacustre | | | Vanhoffen | SAFIT | DFG-ABL |
| Americorophium salmonis | | False | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium salmonis | | | (Stimpson) | SAFIT | DFG-ABL |
| Americorophium spinicorne | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium spinicorne | | | (Stimpson) | SAFIT | DFG-ABL |
| Americorophium stimpsoni | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium stimpsoni | | | (Shoemaker) | SAFIT | DFG-ABL |
| Ameronothridae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Sarcoptiformes | Oribatida | Desmonomata | Ameronothridae | | | | | | | | | Willmann, 1931 | SAFIT | DFW-ABL |
| Ametor | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Ametor | | | | | Semenov | SAFIT | DFG-ABL |
| Ametor latus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Ametor | | Ametor latus | | | (Horn) | SAFIT | DFG-ABL |
| Ametor scabrosus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Ametor | | Ametor scabrosus | | | (Horn) | SAFIT | DFG-ABL |
| Ametropodidae | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ametropodidae | | | | | | | | | Bengtsson | SAFIT | DFG-ABL |
| Ametropus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ametropodidae | | | | Ametropus | | | | | Albarda | SAFIT | DFG-ABL |
| Ametropus ammophilus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ametropodidae | | | | Ametropus | | Ametropus ammophilus | | | Allen and Edmunds | SAFIT | DFG-ABL |
| Amiocentrus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Brachycentridae | | | | Amiocentrus | | | | | Ross | SAFIT | DFG-ABL |
| Amiocentrus aspilus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Brachycentridae | | | | Amiocentrus | | Amiocentrus aspilus | | | (Ross) | SAFIT | DFG-ABL |
| Amnicola | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Amnicolidae | | | | Amnicola | | | | | Gould and Haldeman | SAFIT | DFG-ABL |
| Amnicola limosa | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Amnicolidae | | | | Amnicola | | Amnicola limosa | | | (Say) | SAFIT | DFG-ABL |
| Amnicolidae | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Amnicolidae | | | | | | | | | Tryon | SAFIT | DFG-ABL |
| Ampharete | | False | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Ampharetidae | | | | Ampharete | | | | | Malmgren, 1866 | SAFIT | DFW-ABL |
| Ampharetidae | | True | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Ampharetidae | | | | | | | | | Malmgren, 1866 | SAFIT | DFW-ABL |
| Amphiagrion | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Amphiagrion | | | | | Selys | SAFIT | DFG-ABL |
| Amphiagrion abbreviatum | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Amphiagrion | | Amphiagrion abbreviatum | | | (Selys) | SAFIT | DFG-ABL |
| Amphicosmoecus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Amphicosmoecus | | | | | Schmid | SAFIT | DFG-ABL |
| Amphicosmoecus canax | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Amphicosmoecus | | Amphicosmoecus canax | | | (Ross) | SAFIT | DFG-ABL |
| Amphicteis | | False | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Ampharetidae | | | | Amphicteis | | | | | Grube, 1850 | SAFIT | DFW-ABL |
| Amphinemura | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | | | | Ris | SAFIT | DFG-ABL |
| Amphinemura apache | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | Amphinemura apache | | | Baumann and Gaufin | SAFIT | DFG-ABL |
| Amphinemura mogollonica | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | Amphinemura mogollonica | | | Baumann and Gaufin | SAFIT | DFG-ABL |
| Amphinemura venusta | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | Amphinemura venusta | | | (Banks) | SAFIT | DFG-ABL |
| Amphipoda | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | | | | | | | | | | Latreille | SAFIT | DFG-ABL |
| Amphizoa | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | | | | LeConte | SAFIT | DFG-ABL |
| Amphizoa insolens | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | Amphizoa insolens | | | LeConte | SAFIT | DFG-ABL |
| Amphizoa lecontei | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | Amphizoa lecontei | | | Matthews | SAFIT | DFG-ABL |
| Amphizoa striata | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | Amphizoa striata | | | Van Dyke | SAFIT | DFG-ABL |
| Amphizoidae | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | | | | | | LeConte | SAFIT | DFG-ABL |
| Ampullariidae | | True | Mollusca | | | Gastropoda | Prosobranchia | | Architaenioglossa | | | Ampullariidae | | | | | | | | | Gray | SAFIT | DFG-ABL |
| Ampumixis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Elmidae | | | | Ampumixis | | | | | Sanderson | SAFIT | DFG-ABL |
| Ampumixis dispar | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Elmidae | | | | Ampumixis | | Ampumixis dispar | | | Fall | SAFIT | DFG-ABL |
| Anabolia | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Anabolia | | | | | Stephens | SAFIT | DFG-ABL |
| Anabolia bimaculata | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Anabolia | | Anabolia bimaculata | | | (Walker) | SAFIT | DFG-ABL |
| Anacaena | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Anacaena | | | | | Thomson | SAFIT | DFG-ABL |
| Anacaena limbata | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Anacaena | | Anacaena limbata | | | (Fabricius) | SAFIT | DFG-ABL |
| Anacaena signaticollis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Anacaena | | Anacaena signaticollis | | | (Fall) | SAFIT | DFG-ABL |
| Anacroneuria | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Perlidae | | | | Anacroneuria | | | | | Klapalek | SAFIT | DFG-ABL |
| Anacroneuria wipukupa | | False | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Perlidae | | | | Anacroneuria | | Anacroneuria wipukupa | | | Baumann and Olson | SAFIT | DFG-ABL |
| Anafroptilum | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Baetidae | | | | Anafroptilum | | | | | Kluge, 2011 | SAFIT | DFW-ABL |
| Anafroptilum album | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Baetidae | | | | Anafroptilum | | Anafroptilum album | | | (McDunnough, 1926) | SAFIT | DFW-ABL |
| Anafroptilum asperatum | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Baetidae | | | | Anafroptilum | | Anafroptilum asperatum | | | (Traver, 1935) | SAFIT | DFW-ABL |
| Anafroptilum bifurcatum | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Baetidae | | | | Anafroptilum | | Anafroptilum bifurcatum | | | (McDunnough, 1924) | SAFIT | DFW-ABL |
| Anafroptilum conturbatum | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Baetidae | | | | Anafroptilum | | Anafroptilum conturbatum | | | (McDunnough, 1929) | SAFIT | DFW-ABL |
| Anagapetus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Anagapetus | | | | | Ross | SAFIT | DFG-ABL |
| Anagapetus aisha | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Anagapetus | | Anagapetus aisha | | | Denning | SAFIT | DFG-ABL |
| Anagapetus bernea | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Anagapetus | | Anagapetus bernea | | | Ross | SAFIT | DFG-ABL |
| Anagapetus chandleri | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Anagapetus | | Anagapetus chandleri | | | Ross | SAFIT | DFG-ABL |
| Anagapetus debilis | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Anagapetus | | Anagapetus debilis | | | Ross | SAFIT | DFG-ABL |
| Anagapetus hoodi | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Anagapetus | | Anagapetus hoodi | | | Ross | SAFIT | DFG-ABL |
| Anax | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | | Anax | | | | | Leach | SAFIT | DFG-ABL |
| Anax junius | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | | Anax | | Anax junius | | | (Drury) | SAFIT | DFG-ABL |
| Anax walsinghami | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | | Anax | | Anax walsinghami | | | McLachlan | SAFIT | DFG-ABL |
| Anchycteis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Ptilodactylidae | | | | Anchycteis | | | | | Horn | SAFIT | DFG-ABL |
| Anchycteis velutina | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Ptilodactylidae | | | | Anchycteis | | Anchycteis velutina | | | Horn | SAFIT | DFG-ABL |
| Ancylidae | | True | Mollusca | | | Gastropoda | Pulmonata | | Basommatophora | | | Ancylidae | | | | | | | | | Rafinesque | SAFIT | DFG-ABL |
| Androprosopa | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Nematocera | Culicomorpha | Thaumaleidae | | | | Androprosopa | | | | | Mik, 1898 | SAFIT | DFW-ABL |
| Androprosopa elnora | | False | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Nematocera | Culicomorpha | Thaumaleidae | | | | Androprosopa | | Androprosopa elnora | | | (Dyar and Shannon, 1924) | SAFIT | DFW-ABL |
| Androprosopa fusca | | False | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Nematocera | Culicomorpha | Thaumaleidae | | | | Androprosopa | | Androprosopa fusca | | | (Garrett, 1925) | SAFIT | DFW-ABL |
| Angarotipula | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Nematocera | Tipulomorpha | Tipulidae | Tipulinae | | | Angarotipula | | | | | Savchenko, 1961 | SAFIT | DFW-ABL |
| Anisitsiellidae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Anisitsiellidae | | | | | | | | | Koenike | SAFIT | DFG-ABL |
| Anisogammaridae | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Anisogammaridae | | | | | | | | | Bousfield | SAFIT | DFG-ABL |
| Anisogammarus | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | | | Anisogammaridae | | | | Anisogammarus | | | | | Derzhavin, 1927 | SAFIT | DFW-ABL |
| Anisogammarus pugettensis | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | | | Anisogammaridae | | | | Anisogammarus | | Anisogammarus pugettensis | | | (Dana, 1853) | SAFIT | DFW-ABL |
| Anisoptera | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Odonata | Anisoptera | | | | | | | | | | | Selys, 1854 | SAFIT | DFW-ABL |
| Annelida | | True | Annelida | | | | | | | | | | | | | | | | | | Lamarck | SAFIT | DFG-ABL |
| Annulipalpia | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Trichoptera | Annulipalpia | | | | | | | | | | | Martynov, 1924 | SAFIT | DFW-ABL |
| Anodonta | | True | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | | | | Lamarck | SAFIT | DFG-ABL |
| Anodonta californiensis | | True | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | Anodonta californiensis | | | Lea | SAFIT | DFG-ABL |
| Anodonta couperiana | | True | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | Anodonta couperiana | | | Lea | SAFIT | DFG-ABL |
| Anodonta dejecta | | False | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | Anodonta dejecta | | | Lewis | SAFIT | DFG-ABL |
| Anodonta kennerlyi | | False | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | Anodonta kennerlyi | | | Lea | SAFIT | DFG-ABL |
| Anodonta nuttalliana | Winged Floater Mussel | True | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | Anodonta nuttalliana | | | Lea | SAFIT | DFG-ABL |
| Anodonta oregonense | | True | Mollusca | | | Bivalvia | Palaeoheterodonta | | Unionoida | | | Unionidae | | | | Anodonta | | Anodonta oregonense | | | Lea | SAFIT | DFG-ABL |
| Anopheles | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | | | | Meigen | SAFIT | DFG-ABL |
| Anopheles franciscanus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | Anopheles franciscanus | | | McCracken | SAFIT | DFG-ABL |
| Anopheles freeborni | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | Anopheles freeborni | | | Aitken | SAFIT | DFG-ABL |
| Anopheles hermsi | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | Anopheles hermsi | | | Barr and Guptavanij | SAFIT | DFG-ABL |
| Anopheles judithae | | False | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | Anopheles judithae | | | Zavortnik | SAFIT | DFG-ABL |
| Anopheles occidentalis | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | Anopheles occidentalis | | | Dyar and Knab | SAFIT | DFG-ABL |
| Anopheles punctipennis | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Anopheles | | Anopheles punctipennis | | | (Say) | SAFIT | DFG-ABL |
| Anostraca | | True | Arthropoda | Crustacea | | Branchiopoda | | | Anostraca | | | | | | | | | | | | Sars | SAFIT | DFG-ABL |
| Anostracina | | True | Arthropoda | Crustacea | | Branchiopoda | Sarsostraca | | Anostraca | Anostracina | | | | | | | | | | | Weekers, Murugan, Vanfleteren, Belk, and Dumont (2002) | SAFIT | DFW-ABL |
| Anotomastus | | False | Annelida | | | Polychaeta | Sedentaria | | | | | Capitellidae | | | | Anotomastus | | | | | Hartman, 1947 | SAFIT | DFW-ABL |
| Anthoathecata | | True | Cnidaria | | | Hydrozoa | | | Anthoathecata | | | | | | | | | | | | Cornelius, 1992 | SAFIT | DFW-ABL |
| Anthomedusae | | True | Cnidaria | | | Hydrozoa | | | Hydroida | Anthomedusae | | | | | | | | | | | Haeckel | SAFIT | DFG-ABL |
| Anthopotamus | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Potamanthidae | | | | Anthopotamus | | | | | McCafferty and Bae | SAFIT | DFG-ABL |
| Anthopotamus verticis | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Potamanthidae | | | | Anthopotamus | | Anthopotamus verticis | | | (Say) | SAFIT | DFG-ABL |
| Anthuridae | | True | Arthropoda | Crustacea | | Malacostraca | | | Isopoda | | | Anthuridae | | | | | | | | | | SAFIT | DFG-ABL |
| Antichaeta | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Sciomyzidae | | | | Antichaeta | | | | | | SAFIT | DFG-ABL |
| Antocha | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Tipulidae | Limoniinae | | | Antocha | | | | | Osten Sacken | SAFIT | DFG-ABL |
| Antocha monticola | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Tipulidae | Limoniinae | | | Antocha | | Antocha monticola | | | Alexander | SAFIT | DFG-ABL |
| Anystina | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | | | | | | | | | | van der Hammen, 1972 | SAFIT | DFW-ABL |
| Apanisagrion | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Apanisagrion | | | | | Kennedy | SAFIT | DFG-ABL |
| Apanisagrion lais | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Apanisagrion | | Apanisagrion lais | | | (Brauer) | SAFIT | DFG-ABL |
| Apatania | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Apatania | | | | | Kolenati | SAFIT | DFG-ABL |
| Apatania arizona | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Apatania | | Apatania arizona | | | Wiggins | SAFIT | DFG-ABL |
| Apatania chasica | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Apatania | | Apatania chasica | | | (Denning) | SAFIT | DFG-ABL |
| Apatania sorex | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Apatania | | Apatania sorex | | | (Ross) | SAFIT | DFG-ABL |
| Apatania tavala | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Apatania | | Apatania tavala | | | (Denning) | SAFIT | DFG-ABL |
| Apataniidae | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | | | | | | Wallengren | SAFIT | DFG-ABL |
| Apatolestes | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Tabanidae | | | | Apatolestes | | | | | Williston | SAFIT | DFG-ABL |
| Apedilum | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Chironominae | Chironomini | | Apedilum | | | | | Townes | SAFIT | DFG-ABL |
| Apedilum elachista | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Chironominae | Chironomini | | Apedilum | | Apedilum elachista | | | Townes | SAFIT | DFG-ABL |
| Apedilum subcinctum | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Chironominae | Chironomini | | Apedilum | | Apedilum subcinctum | | | Townes | SAFIT | DFG-ABL |
| Apheviderulicidae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Apheviderulicidae | | | | | | | | | Gerecke, Smith and Cook, 1999 | SAFIT | DFW-ABL |
| Apheviderulix | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Apheviderulicidae | | | | Apheviderulix | | | | | Gerecke, et al., 1999 | SAFIT | DFW-ABL |
| Apheviderulix santana | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Apheviderulicidae | | | | Apheviderulix | | Apheviderulix santana | | | Gerecke, et al., 1999 | SAFIT | DFW-ABL |
| Aphodius | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Scarabaeidae | | | | Aphodius | | | | | Illiger | SAFIT | DFG-ABL |
| Aphodius alternatus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Scarabaeidae | | | | Aphodius | | Aphodius alternatus | | | Horn | SAFIT | DFG-ABL |
| Aplanulata | | True | Cnidaria | | | Hydrozoa | | | Anthoathecata | Aplanulata | | | | | | | | | | | Collins, et al., 2005 | SAFIT | DFW-ABL |
| Aplexa | | False | Mollusca | | | Gastropoda | Pulmonata | | Basommatophora | | | Physidae | | | | Aplexa | | | | | Fleming | SAFIT | DFG-ABL |
| Aplexa elongata | | False | Mollusca | | | Gastropoda | Pulmonata | | Basommatophora | | | Physidae | | | | Aplexa | | Aplexa elongata | | | (Say) | SAFIT | DFG-ABL |
| Apobaetis | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Apobaetis | | | | | Day | SAFIT | DFG-ABL |
| Apobaetis etowah | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Apobaetis | | Apobaetis etowah | | | (Traver) | SAFIT | DFG-ABL |
| Apohyale | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | | | Hyalellidae | | | | Apohyale | | | | | Bousfield and Hendrycks, 2002 | SAFIT | DFW-ABL |
| Apohyale pugettensis | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | | | Hyalellidae | | | | Apohyale | | Apohyale pugettensis | | | (Dana, 1853) | SAFIT | DFW-ABL |
| Apsectrotanypus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Apsectrotanypus | | | | | Fittkau | SAFIT | DFG-ABL |
| Apsectrotanypus algens | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Apsectrotanypus | | Apsectrotanypus algens | | | (Coquillett) | SAFIT | DFG-ABL |
| Apsectrotanypus florens | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Apsectrotanypus | | Apsectrotanypus florens | | | (Johannsen) | SAFIT | DFG-ABL |
| Apsectrotanypus johnsoni | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Apsectrotanypus | | Apsectrotanypus johnsoni | | | Coquillet | SAFIT | DFG-ABL |
| Apteraliplus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Haliplidae | | | | Apteraliplus | | | | | Chandler | SAFIT | DFG-ABL |
| Apteraliplus parvulus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Haliplidae | | | | Apteraliplus | | Apteraliplus parvulus | | | (Roberts) | SAFIT | DFG-ABL |
| Aquarius | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Gerridae | | | | Aquarius | | | | | Schellenberg | SAFIT | DFG-ABL |
| Aquarius amplus | | False | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Gerridae | | | | Aquarius | | Aquarius amplus | | | (Drake and Harris) | SAFIT | DFG-ABL |
| Aquarius nyctalis | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Gerridae | | | | Aquarius | | Aquarius nyctalis | | | (Drake and Hottes) | SAFIT | DFG-ABL |
| Aquarius remigis | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Gerridae | | | | Aquarius | | Aquarius remigis | | | (Say) | SAFIT | DFG-ABL |
| Arachnida | | True | Arthropoda | Chelicerata | | Arachnida | | | | | | | | | | | | | | | Cuvier | SAFIT | DFG-ABL |
| Araeopidius | | False | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Ptilodactylidae | | | | Araeopidius | | | | | Cockerell | SAFIT | DFG-ABL |
| Araeopidius monochus | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Ptilodactylidae | | | | Araeopidius | | Araeopidius monochus | | | LeConte | SAFIT | DFG-ABL |
| Archilestes | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Lestidae | | | | Archilestes | | | | | Selys | SAFIT | DFG-ABL |
| Archilestes californica | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Lestidae | | | | Archilestes | | Archilestes californica | | | McLachlan | SAFIT | DFG-ABL |
| Archilestes grandis | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Lestidae | | | | Archilestes | | Archilestes grandis | | | (Rambur) | SAFIT | DFG-ABL |
| Architaenioglossa | | True | Mollusca | | | Gastropoda | Prosobranchia | | Architaenioglossa | | | | | | | | | | | | Haller | SAFIT | DFG-ABL |
| Arcteobia | | False | Annelida | | | Polychaeta | Errantia | | Phyllodocida | | | Polynoidae | | | | Arcteobia | | | | | Annenkova, 1937 | SAFIT | DFW-ABL |
| Arcteonais | | True | Annelida | Clitellata | | Oligochaeta | | Microdrili | Tubificida | | | Naididae | | | | Arcteonais | | | | | Piguet | SAFIT | DFG-ABL |
| Arcteonais lomondi | | True | Annelida | Clitellata | | Oligochaeta | | Microdrili | Tubificida | | | Naididae | | | | Arcteonais | | Arcteonais lomondi | | | (Martin) | SAFIT | DFG-ABL |
| Arctitalitus | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Talitridae | | | | Arctitalitus | | | | | Hurley | SAFIT | DFG-ABL |
| Arctitalitus sylvaticus | | True | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Talitridae | | | | Arctitalitus | | Arctitalitus sylvaticus | | | (Haswell) | SAFIT | DFG-ABL |
| Arctoconopa | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Nematocera | Tipulomorpha | Limoniidae | Chioneinae | | | Arctoconopa | | | | | Alexander, 1955 | SAFIT | DFW-ABL |
| Arctocorisa | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Corixidae | | | | Arctocorisa | | | | | Wallengren | SAFIT | DFG-ABL |
| Arctocorisa sutilis | | True | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Corixidae | | | | Arctocorisa | | Arctocorisa sutilis | | | (Uhler) | SAFIT | DFG-ABL |
| Arctopsyche | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydropsychidae | | | | Arctopsyche | | | | | MacLachlan | SAFIT | DFG-ABL |
| Arctopsyche californica | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydropsychidae | | | | Arctopsyche | | Arctopsyche californica | | | Ling | SAFIT | DFG-ABL |
| Arctopsyche grandis | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydropsychidae | | | | Arctopsyche | | Arctopsyche grandis | | | (Banks) | SAFIT | DFG-ABL |
| Arctopsyche grandis/ inermis | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Trichoptera | Annulipalpia | | Hydropsychidae | Arctopsychinae | | | Arctopsyche | Arctopsyche grandis/ inermis | | | | (Banks, 1900)/ Banks, 1943 | SAFIT | DFW-ABL |
| Arctopsyche inermis | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Trichoptera | Annulipalpia | | Hydropsychidae | Arctopsychinae | | | Arctopsyche | | Arctopsyche inermis | | | Banks, 1943 | SAFIT | DFW-ABL |
| Arctopsychinae | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydropsychidae | Arctopsychinae | | | | | | | | | SAFIT | DFG-ABL |
| Argia | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | | | | Rambur | SAFIT | DFG-ABL |
| Argia agrioides | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia agrioides | | | Calvert | SAFIT | DFG-ABL |
| Argia alberta | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia alberta | | | Kennedy | SAFIT | DFG-ABL |
| Argia emma | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia emma | | | Kennedy | SAFIT | DFG-ABL |
| Argia fumipennis | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia fumipennis | | | (Burmeister) | SAFIT | DFG-ABL |
| Argia hinei | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia hinei | | | Kennedy | SAFIT | DFG-ABL |
| Argia immunda | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia immunda | | | (Hagen) | SAFIT | DFG-ABL |
| Argia lacrimans | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia lacrimans | | | (Hagen) | SAFIT | DFG-ABL |
| Argia lugens | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia lugens | | | (Hagen) | SAFIT | DFG-ABL |
| Argia moesta | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia moesta | | | (Hagen) | SAFIT | DFG-ABL |
| Argia munda | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia munda | | | Calvert | SAFIT | DFG-ABL |
| Argia nahuana | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia nahuana | | | Calvert | SAFIT | DFG-ABL |
| Argia oenea | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia oenea | | | Hagen in Selys | SAFIT | DFG-ABL |
| Argia pallens | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia pallens | | | Calvert | SAFIT | DFG-ABL |
| Argia pima | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia pima | | | Garrison | SAFIT | DFG-ABL |
| Argia plana | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia plana | | | Calvert | SAFIT | DFG-ABL |
| Argia sabino | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia sabino | | | Garrison | SAFIT | DFG-ABL |
| Argia sedula | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia sedula | | | (Hagen) | SAFIT | DFG-ABL |
| Argia tarascana | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia tarascana | | | Calvert | SAFIT | DFG-ABL |
| Argia tezpi | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia tezpi | | | Calvert | SAFIT | DFG-ABL |
| Argia tonto | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia tonto | | | Calvert | SAFIT | DFG-ABL |
| Argia translata | | False | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia translata | | | Hagen in Selys | SAFIT | DFG-ABL |
| Argia vivida | | True | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Argia | | Argia vivida | | | Hagen | SAFIT | DFG-ABL |
| Argulidae | | True | Arthropoda | Crustacea | | Maxillopoda | | | Arguloida | | | Argulidae | | | | | | | | | Leach | SAFIT | DFG-ABL |
| Arguloida | | True | Arthropoda | Crustacea | | Maxillopoda | | | Arguloida | | | | | | | | | | | | Yamaguti | SAFIT | DFG-ABL |
| Argulus | | True | Arthropoda | Crustacea | | Maxillopoda | | | Arguloida | | | Argulidae | | | | Argulus | | | | | Müller | SAFIT | DFG-ABL |
| Argulus japonicus | | True | Arthropoda | Crustacea | | Maxillopoda | Branchiura | | Arguloida | | | Argulidae | | | | Argulus | | Argulus japonicus | | | Thiele, 1900 | SAFIT | DFW-ABL |
| Argulus melanostictus | | True | Arthropoda | Crustacea | | Maxillopoda | Branchiura | | Arguloida | | | Argulidae | | | | Argulus | | Argulus melanostictus | | | Wilson C.B., 1935 | SAFIT | DFW-ABL |
| Arhynchobdellida | | True | Annelida | Clitellata | | Hirudinea | | | Arhynchobdellida | | | | | | | | | | | | Blanchard | SAFIT | DFG-ABL |
| Aricidea | | False | Annelida | | | Polychaeta | Sedentaria | | | | | Paraonidae | | | | Aricidea | | | | | Webster, 1879 | SAFIT | DFW-ABL |
| Arizonacarus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Limnesiidae | | | | Arizonacarus | | | | | Smith and Cook, 1994 | SAFIT | DFW-ABL |
| Armandia | | False | Annelida | | | Polychaeta | Sedentaria | | | | | Opheliidae | | | | Armandia | | | | | Filippi, 1861 | SAFIT | DFW-ABL |
| Arrenuridae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Arrenuridae | | | | | | | | | Thor | SAFIT | DFG-ABL |
| Arrenurus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Arrenuridae | | | | Arrenurus | | | | | Dugés | SAFIT | DFG-ABL |
| Arrenurus belonocercus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus belonocercus | | | Lavers, 1945 | SAFIT | DFW-ABL |
| Arrenurus capillatus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus capillatus | | | (Marshall, 1908) | SAFIT | DFW-ABL |
| Arrenurus dentipetiolatus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus dentipetiolatus | | | Marshall, 1908 | SAFIT | DFW-ABL |
| Arrenurus kennedyorum | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus kennedyorum | | | Habeeb, 1963 | SAFIT | DFW-ABL |
| Arrenurus krameri | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus krameri | | | (Koenike, 1895) | SAFIT | DFW-ABL |
| Arrenurus laversi | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus laversi | | | Marshall, 1944 | SAFIT | DFW-ABL |
| Arrenurus pistillatus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus pistillatus | | | Marshall, 1908 | SAFIT | DFW-ABL |
| Arrenurus tahoei | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Arrenuridae | | | | Arrenurus | | Arrenurus tahoei | | | (Marshall, 1910) | SAFIT | DFW-ABL |
| Arsapnia | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | | | | Banks, 1897 | SAFIT | DFW-ABL |
| Arsapnia coyote | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia coyote | | | (Nelson and Baumann, 1987) | SAFIT | DFW-ABL |
| Arsapnia decepta | | False | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia decepta | | | Banks, 1897 | SAFIT | DFW-ABL |
| Arsapnia pileata | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia pileata | | | (Jewett, 1966) | SAFIT | DFW-ABL |
| Arsapnia sequoia | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia sequoia | | | (Nelson and Baumann, 1987) | SAFIT | DFW-ABL |
| Arsapnia teresa | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia teresa | | | (Claassen, 1924) | SAFIT | DFW-ABL |
| Arsapnia tumida | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia tumida | | | (Claassen, 1924) | SAFIT | DFW-ABL |
| Arsapnia utahensis | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Plecoptera | Euholognatha | | Capniidae | | | | Arsapnia | | Arsapnia utahensis | | | (Gaufin and Jewett, 1962) | SAFIT | DFW-ABL |
| Artemia | | True | Arthropoda | Crustacea | | Branchiopoda | | | Anostraca | | | Artemiidae | | | | Artemia | | | | | Leach | SAFIT | DFG-ABL |
| Artemia franciscana | | True | Arthropoda | Crustacea | | Branchiopoda | | | Anostraca | | | Artemiidae | | | | Artemia | | Artemia franciscana | | | Kellogg | SAFIT | DFG-ABL |
| Artemia monica | | True | Arthropoda | Crustacea | | Branchiopoda | | | Anostraca | | | Artemiidae | | | | Artemia | | Artemia monica | | | Verrill | SAFIT | DFG-ABL |
| Artemiidae | | True | Arthropoda | Crustacea | | Branchiopoda | | | Anostraca | | | Artemiidae | | | | | | | | | Growchowski | SAFIT | DFG-ABL |
| Artemiina | | True | Arthropoda | Crustacea | | Branchiopoda | Sarsostraca | | Anostraca | Artemiina | | | | | | | | | | | Weekers, Murugan, Vanfleteren, Belk, and Dumont (2002) | SAFIT | DFW-ABL |
| Arthropoda | | True | Arthropoda | | | | | | | | | | | | | | | | | | Siebold and Stannius | SAFIT | DFG-ABL |
| Ascidae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Mesostigmata | Monogynaspida | Gamasina | Ascidae | | | | | | | | | Voigts and Oudemans, 1905 | SAFIT | DFW-ABL |
| Asellidae | | True | Arthropoda | Crustacea | | Malacostraca | | | Isopoda | | | Asellidae | | | | | | | | | Latreille | SAFIT | DFG-ABL |
| Asellota | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Isopoda | Asellota | | | | | | | | | | | Latreille, 1802 | SAFIT | DFW-ABL |
| Asellus | | True | Arthropoda | Crustacea | | Malacostraca | | | Isopoda | | | Asellidae | | | | Asellus | | | | | Geoffrey | SAFIT | DFG-ABL |
| Asellus hilgendorfi | | True | Arthropoda | Crustacea | | Malacostraca | | | Isopoda | | | Asellidae | | | | Asellus | | Asellus hilgendorfi | | | Bouvallius | SAFIT | DFG-ABL |
| Asilomorpha | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Brachycera | Asilomorpha | | | | | | | | | | Rohdendorf, 1961 | SAFIT | DFW-ABL |
| Asioplax | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Leptohyphidae | | | | Asioplax | | | | | Wiersema and McCafferty | SAFIT | DFG-ABL |
| Asioplax edmundsi | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Leptohyphidae | | | | Asioplax | | Asioplax edmundsi | | | (Allen) | SAFIT | DFG-ABL |
| Assiminea | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Assimineidae | | | | Assiminea | | | | | Fleming | SAFIT | DFG-ABL |
| Assiminea californica | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Assimineidae | | | | Assiminea | | Assiminea californica | | | (Tryon) | SAFIT | DFG-ABL |
| Assiminea infima | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Assimineidae | | | | Assiminea | | Assiminea infima | | | Berry | SAFIT | DFG-ABL |
| Assimineidae | | True | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Assimineidae | | | | | | | | | Adams and Adams | SAFIT | DFG-ABL |
| Astacidae | | True | Arthropoda | Crustacea | | Malacostraca | | | Decapoda | | | Astacidae | | | | | | | | | Latreille | SAFIT | DFG-ABL |
| Astacidea | | True | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Eucarida | Decapoda | | Astacidea | | | | | | | | | | Latreille, 1802 | SAFIT | DFW-ABL |
| Asynarchus | | True | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Asynarchus | | | | | MacLachlan | SAFIT | DFG-ABL |
| Asynarchus aldinus | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Asynarchus | | Asynarchus aldinus | | | (Ross) | SAFIT | DFG-ABL |
| Asynarchus cinnamoneus | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Asynarchus | | Asynarchus cinnamoneus | | | Schmid | SAFIT | DFG-ABL |
| Asynarchus montanus | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Asynarchus | | Asynarchus montanus | | | (Banks) | SAFIT | DFG-ABL |
| Asynarchus pacificus | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Asynarchus | | Asynarchus pacificus | | | (Banks) | SAFIT | DFG-ABL |
| Athericidae | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Athericidae | | | | | | | | | Stuckenberg | SAFIT | DFG-ABL |
| Atherix | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Athericidae | | | | Atherix | | | | | Meigen | SAFIT | DFG-ABL |
| Atherix pachypus | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Athericidae | | | | Atherix | | Atherix pachypus | | | Bigot | SAFIT | DFG-ABL |
| Athienemanniidae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Athienemanniidae | | | | | | | | | Viets | SAFIT | DFG-ABL |
| Atopsyche | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydrobiosidae | | | | Atopsyche | | | | | Banks | SAFIT | DFG-ABL |
| Atopsyche sperryi | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydrobiosidae | | | | Atopsyche | | Atopsyche sperryi | | | Denning | SAFIT | DFG-ABL |
| Atopsyche tripunctata | | False | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydrobiosidae | | | | Atopsyche | | Atopsyche tripunctata | | | Banks | SAFIT | DFG-ABL |
| Atractelmis | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Elmidae | | | | Atractelmis | | | | | Chandler | SAFIT | DFG-ABL |
| Atractelmis wawona | | True | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Elmidae | | | | Atractelmis | | Atractelmis wawona | | | Chandler | SAFIT | DFG-ABL |
| Atractides | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Hygrobatidae | | | | Atractides | | | | | Koch | SAFIT | DFG-ABL |
| Atractides arti | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hygrobatidae | | | | Atractides | | Atractides arti | | | Habeeb, 1979 | SAFIT | DFW-ABL |
| Atractides barti | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hygrobatidae | | | | Atractides | | Atractides barti | | | Habeeb, 1979 | SAFIT | DFW-ABL |
| Atractides nodipalpis | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hygrobatidae | | | | Atractides | | Atractides nodipalpis | | | Thor, 1899 | SAFIT | DFW-ABL |
| Atractides sexscutatus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hygrobatidae | | | | Atractides | | Atractides sexscutatus | | | Habeeb, 1961 | SAFIT | DFW-ABL |
| Atractides terraconfusensis | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hygrobatidae | | | | Atractides | | Atractides terraconfusensis | | | Habeeb, 1959 | SAFIT | DFW-ABL |
| Atrichomelina | | True | Arthropoda | Hexapoda | | Insecta | Pterygota | | Diptera | Brachycera | Muscomorpha | Sciomyzidae | | | | Atrichomelina | | | | | Cresson, 1920 | SAFIT | DFW-ABL |
| Atrichopogon | | True | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Ceratopogonidae | Forcipomyiinae | | | Atrichopogon | | | | | Kieffer | SAFIT | DFG-ABL |
| Attenella | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ephemerellidae | | | | Attenella | | | | | Edmunds | SAFIT | DFG-ABL |
| Attenella attenuata | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ephemerellidae | | | | Attenella | | Attenella attenuata | | | (McDunnough) | SAFIT | DFG-ABL |
| Attenella delantala | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ephemerellidae | | | | Attenella | | Attenella delantala | | | Mayo | SAFIT | DFG-ABL |
| Attenella margarita | | False | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ephemerellidae | | | | Attenella | | Attenella margarita | | | (Needham) | SAFIT | DFG-ABL |
| Attenella soquele | | True | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ephemerellidae | | | | Attenella | | Attenella soquele | | | (Day) | SAFIT | DFG-ABL |
| Aturidae | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Aturidae | | | | | | | | | Thor | SAFIT | DFG-ABL |
| Aturus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Aturidae | | | | Aturus | | | | | Kramer | SAFIT | DFG-ABL |
| Aturus acadiensis | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus acadiensis | | | Habeeb, 1953 | SAFIT | DFW-ABL |
| Aturus azusus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus azusus | | | Habeeb, 1959 | SAFIT | DFW-ABL |
| Aturus bingamani | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus bingamani | | | Habeeb, 1962 | SAFIT | DFW-ABL |
| Aturus californiensis | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus californiensis | | | Habeeb, 1959 | SAFIT | DFW-ABL |
| Aturus fraseri | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus fraseri | | | Habeeb, 1959 | SAFIT | DFW-ABL |
| Aturus insignificus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus insignificus | | | Habeeb, 1964 | SAFIT | DFW-ABL |
| Aturus ishii | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus ishii | | | Habeeb, 1978 | SAFIT | DFW-ABL |
| Aturus majorellus | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus majorellus | | | Habeeb, 1963 | SAFIT | DFW-ABL |
| Aturus medicorum | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus medicorum | | | Habeeb, 1979 | SAFIT | DFW-ABL |
| Aturus mugyonensis | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus mugyonensis | | | Habeeb, 1962 | SAFIT | DFW-ABL |
| Aturus nikhabeebi | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus nikhabeebi | | | Habeeb, 1976 | SAFIT | DFW-ABL |
| Aturus sangabrielensis | | True | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Aturidae | | | | Aturus | | Aturus sangabrielensis | | | Habeeb, 1961 | SAFIT | DFW-ABL |
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