| FinalID | CommonName | Phylum | Subphylum | Superclass | Class | Subclass | Superorder | Order | Suborder | Superfamily | Family | Subfamily | Tribe | GenusComplex | Genus | SpeciesComplex | Species | Subspecies | Variety | TaxonomicAuthority | FinalIDAuthority | Source |
| Abarenicola pacifica | | Annelida | | | Polychaeta | Scolecida | | | | | Arenicolidae | | | | Abarenicola | | pacifica | | | | SCAMIT | OCSD |
| Abedus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | | | | Stal | SAFIT | DFG-ABL |
| Abedus breviceps | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus breviceps | | | Stal | SAFIT | DFG-ABL |
| Abedus herberti | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus herberti | | | Hidalgo | SAFIT | DFG-ABL |
| Abedus indentatus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus indentatus | | | (Haldeman) | SAFIT | DFG-ABL |
| Abedus ovatus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus ovatus | | | Stal | SAFIT | DFG-ABL |
| Abedus parkeri | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus parkeri | | | Menke | SAFIT | DFG-ABL |
| Abedus vicinus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Belostomatidae | | | | Abedus | | Abedus vicinus | | | Mayr | SAFIT | DFG-ABL |
| Ablabesmyia | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneurini | | Ablabesmyia | | | | | Johannsen | SAFIT | DFG-ABL |
| Ablabesmyia annulata | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia annulata | | | (Say) | SAFIT | DFG-ABL |
| Ablabesmyia aspera | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia aspera | | | (Roback) | SAFIT | DFG-ABL |
| Ablabesmyia cinctipes | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia cinctipes | | | (Johannsen) | SAFIT | DFG-ABL |
| Ablabesmyia mallochi | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia mallochi | | | (Walley) | SAFIT | DFG-ABL |
| Ablabesmyia monilis | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia monilis | | | (Linnaeus) | SAFIT | DFG-ABL |
| Ablabesmyia peleensis | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia peleensis | | | (Walley) | SAFIT | DFG-ABL |
| Ablabesmyia pulchripennis | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Pentaneuriini | | Ablabesmyia | | Ablabesmyia pulchripennis | | | (Lundbeck) | SAFIT | DFG-ABL |
| Acalyptonotidae | | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Acalyptonotidae | | | | | | | | | Walter | SAFIT | DFG-ABL |
| Acalyptonotus | | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Acalyptonotidae | | | | Acalyptonotus | | | | | Acalyptonotus Walter, 1911 | SAFIT | DFG-ABL |
| Acalyptonotus pacificus | | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Acalyptonotidae | | | | Acalyptonotus | | Acalyptonotus pacificus | | | Smith | SAFIT | DFG-ABL |
| Acanaloniidae | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | Auchenorrhynca | Fulgoroidea | Acanaloniidae | | | | | | | | | | SCCWRP | SCCWRP |
| Acanthocyclops vernalis | | Arthropoda | Crustacea | Multicrustacea | Copepoda | | Podoplea | Cyclopoida | Cyclopida | | Cyclopidae | | | | Acanthocyclops | | Acanthocyclops vernalis | | | | Not Recorded | BSA_Env |
| Acanthogobius flavimanus | Yellowfin Goby | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Perciformes | | | Gobiidae | | | | Acanthogobius | | Acanthogobius flavimanus | | | | Not Recorded | OSPR |
| Acanthomysis | | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Acanthomysis | | | | | Czerniavsky | SAFIT | DFG-ABL |
| Acanthomysis aspera | | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Acanthomysis | | Acanthomysis aspera | | | Ii | SAFIT | DFG-ABL |
| Acanthomysis hwanhaiensis | | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Acanthomysis | | Acanthomysis hwanhaiensis | | | Ii | SAFIT | DFG-ABL |
| Acanthosomatidae | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | Heteroptera | Pentatomoidea | Acanthosomatidae | | | | | | | | | | SCCWRP | SCCWRP |
| Acari | | Arthropoda | Chelicerata | | Arachnida | Acari | | | | | | | | | | | | | | Leach | SAFIT | DFG-ABL |
| Acaulon | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Acaulon | | | | | | CSUMB-WEE | CSUMB-WEE |
| Acaulon rufescens | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Acaulon | | Acaulon rufescens | | | | CSUMB-WEE | CSUMB-WEE |
| Acaulon triquetrum | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Acaulon | | Acaulon triquetrum | | | | CSUMB-WEE | CSUMB-WEE |
| Acentrella | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acentrella | | | | | Bengtsson | SAFIT | DFG-ABL |
| Acentrella insignificans | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acentrella | | Acentrella insignificans | | | (McDunnough) | SAFIT | DFG-ABL |
| Acentrella turbida | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acentrella | | Acentrella turbida | | | (McDunnough) | SAFIT | DFG-ABL |
| Acerotisa californica | | Platyhelminthes | | | Turbellaria | | | Polycladida | Cotylea | Euryleptoidea | Euryleptidae | | | | Acerotisa | | californica | | | | SCAMIT | OCSD |
| Acerpenna | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | | | | Waltz and McCafferty | SAFIT | DFG-ABL |
| Acerpenna pygmaea | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | Acerpenna pygmaea | | | (Hagen) | SAFIT | DFG-ABL |
| Acerpenna sulfurosus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | Acerpenna sulfurosus | | | (Day) | SAFIT | DFG-ABL |
| Acerpenna thermophilus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Baetidae | | | | Acerpenna | | Acerpenna thermophilus | | | | SAFIT | DFG-ABL |
| Achilidae | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | Auchenorrhynca | Fulgoroidea | Achilidae | | | | | | | | | | SCCWRP | SCCWRP |
| Achnanthaceae | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | | | | | | | CAD_TWG | UCOB |
| Achnanthales | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | | | | | | | | | | | CAD_TWG | UCOB |
| Achnantheiopsis | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnantheiopsis | | | | | Lange-Bertalot | CAD_TWG | CSUSM |
| Achnantheiopsis lanceolatoides | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnantheiopsis | | Achnantheiopsis lanceolatoides | | | (Sovereign) Lange-Bertalot | CAD_TWG | CSUSM |
| Achnanthes | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | | | | | CAD_TWG | UCOB |
| Achnanthes acares | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes acares | | | M.H.Hohn & Hellerman | CAD_TWG | CSUSM |
| Achnanthes affinis | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes affinis | | | Grunow | Not Recorded | UCD-TERC |
| Achnanthes brevipes | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes brevipes | | | Agardh | CAD_TWG | EcoAnalysts |
| Achnanthes brevipes var intermedia | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes brevipes | | Achnanthes brevipes var intermedia | (Kutzing) Cleve | CAD_TWG | EcoAnalysts |
| Achnanthes cf coarctata | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes cf coarctata | | | | CAD_TWG | CSUSM |
| Achnanthes coarctata | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes coarctata | | | (Brebisson ex W Smith) Grunow in Cleve & Grunow | CAD_TWG | UCOB |
| Achnanthes crenulata | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes crenulata | | | Grunow in Cleve & Grunow | CAD_TWG | UCOB |
| Achnanthes exigua | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes exigua | | | Grunow | Not Recorded | UCD-TERC |
| Achnanthes exigua var elliptica | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes exigua var elliptica | | | Hust. | CAD_TWG | CSUSM |
| Achnanthes gibberula | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes gibberula | | | Grunow | Not Recorded | UCD-TERC |
| Achnanthes inflata | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes inflata | | | (Kutzing) Grunow | CAD_TWG | UCOB |
| Achnanthes ingratiformis | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes ingratiformis | | | Lange-Bertalot | CAD_TWG | UCOB |
| Achnanthes lanceolata | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes lanceolata | | | Grunow | Not Recorded | UCD-TERC |
| Achnanthes lemmermannii | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes lemmermannii | | | Hustedt | CAD_TWG | CSUSM |
| Achnanthes minutissima | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes minutissima | | | Kutzing | Not Recorded | UCD-TERC |
| Achnanthes peragalli | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes peragalli | | | Brun & Heribaud-Joseph | Not Recorded | UCD-TERC |
| Achnanthes sp 1 | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes sp 1 | | | | CAD_TWG | EcoAnalysts |
| Achnanthes sp 1 PRW | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes sp 1 PRW | | | | CAD_TWG | UCOB |
| Achnanthes sp 18 | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes sp 18 | | | | CAD_TWG | CSUSM |
| Achnanthes sp 3 | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes sp 3 | | | | CAD_TWG | CSUSM |
| Achnanthes sp 4 | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes sp 4 | | | | CAD_TWG | CSUSM |
| Achnanthes sp 5 | | Bacillariophyta | | | Bacillariophyceae | | | Mastogloiales | | | Achnanthaceae | | | | Achnanthes | | Achnanthes sp 5 | | | | CAD_TWG | CSUSM |
| Achnanthidiaceae | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | | | | | | | CAD_TWG | UCOB |
| Achnanthidium | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | | | | | CAD_TWG | UCOB |
| Achnanthidium affine | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium affine | | | (Grunow) Czarnecki | CAD_TWG | UCOB |
| Achnanthidium alpestre | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium alpestre | | | (Lowe & Kociolek) Lowe & Kociolek in Johansen et a | CAD_TWG | UCOB |
| Achnanthidium atomus | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium atomus | | | (Hust.) Monnier, Lange-Bert. & Ector | CAD_TWG | CSUSM |
| Achnanthidium caledonicum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium caledonicum | | | | CAD_TWG | EcoAnalysts |
| Achnanthidium catenatum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium catenatum | | | (Bily and Marvan) Lange-Bertalot | CAD_TWG | EcoAnalysts |
| Achnanthidium cf caledonicum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium cf caledonicum | | | | CAD_TWG | CSUSM |
| Achnanthidium cf latecephalum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium cf latecephalum | | | Kobayasi 1997 | CAD_TWG | EcoAnalysts |
| Achnanthidium cf minutissimum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium cf minutissimum | | | (Kutzing) Czarnecki | CAD_TWG | EcoAnalysts |
| Achnanthidium crassum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium crassum | | | (Hustedt) Potapova & Ponader | CAD_TWG | CSUSM |
| Achnanthidium deflexum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium deflexum | | | (Reimer) Kingston | CAD_TWG | UCOB |
| Achnanthidium druartii | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium druartii | | | Rimet & Coute | CAD_TWG | CSUSM |
| Achnanthidium eutrophilum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium eutrophilum | | | (Lange-Bertalot) Lange-Bertalot | CAD_TWG | EcoAnalysts |
| Achnanthidium exiguum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium exiguum | | | (Grunow) Czarnecki | CAD_TWG | UCOB |
| Achnanthidium exiguum var heterovalvum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium exiguum | | Achnanthidium exiguum var heterovalvum | (Krasske) Czarnecki | CAD_TWG | UCOB |
| Achnanthidium exile | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium exile | | | (Kutzing) Heiberg 1863 | CAD_TWG | MPSL-MLML |
| Achnanthidium gracillimum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium gracillimum | | | (Meister) Lange-Bertalot | CAD_TWG | EcoAnalysts |
| Achnanthidium jackii | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium jackii | | | Rabenhorst | CAD_TWG | UCOB |
| Achnanthidium kranzii | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium kranzii | | | (Lange-Bertalot) Round et Bukhtiyarova | CAD_TWG | CSUSM |
| Achnanthidium latecephalum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium latecephalum | | | H.Kobayasi | CAD_TWG | CSUSM |
| Achnanthidium lineare | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium lineare | | | W.Smith | CAD_TWG | CSUSM |
| Achnanthidium macrocephalum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium macrocephalum | | | (Hustedt) Round & Bukhtiyarova | CAD_TWG | UCOB |
| Achnanthidium minutissimum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium minutissimum | | | (Kutzing) Czarnecki | CAD_TWG | UCOB |
| Achnanthidium neomicrocephalum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium neomicrocephalum | | | Lange-Bertalot & Staab | CAD_TWG | CSUSM |
| Achnanthidium pyrenaicum | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium pyrenaicum | | | (Hustedt) Kobayasi | CAD_TWG | UCOB |
| Achnanthidium reimeri | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium reimeri | | | (Camburn) Ponander and Potapova | CAD_TWG | EcoAnalysts |
| Achnanthidium rivulare | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium rivulare | | | Potapova & Ponader | CAD_TWG | EcoAnalysts |
| Achnanthidium rosenstockii | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium rosenstockii | | | (Lange-Bertalot) Lange-Bertalot | CAD_TWG | CSUSM |
| Achnanthidium sp 1 | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium sp 1 | | | | CAD_TWG | EcoAnalysts |
| Achnanthidium subatomus | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium subatomus | | | (Hustedt) Lange-Bertalot | CAD_TWG | UCOB |
| Achnanthidium subhudsonis | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium subhudsonis | | | (Hustedt) H Kobayasi in Kobayasi et al | CAD_TWG | UCOB |
| Achnanthidium subhudsonis var kraeuselii | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium subhudsonis | | Achnanthidium subhudsonis var kraeuselii | (Cholnoky) Cantonati & Lange-Bertalot | CAD_TWG | CSUSM |
| Achnanthidium thienemannii | | Heterokontophyta | | | Bacillariophyceae | | | Achnanthales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium thienemannii | | | (Hustedt) Lange-Bertalot | Not Recorded | Rhithron |
| Achnanthidium reimeri | | Bacillariophyta | | | Bacillariophyceae | | | Cocconeidales | | | Achnanthidiaceae | | | | Achnanthidium | | Achnanthidium reimeri | | | (Camburn) Ponander and Potapova | CAD_TWG | EcoAnalysts |
| Aciculata | | Annelida | Aclitellata | | Polychaeta | Palpata | | Aciculata | | | | | | | | | | | | Rouse and Fauchald | SAFIT | DFG-ABL |
| Acilius | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Dytiscinae | | | Acilius | | | | | Leach | SAFIT | DFG-ABL |
| Acilius abbreviatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Dytiscinae | | | Acilius | | Acilius abbreviatus | | | Mannerheim | SAFIT | DFG-ABL |
| Acipenser medirostris | Green Sturgeon | Chordata | | | | | | | | | | | | | Acipenser | | Acipenser medirostris | | | | Not Recorded | SFEI |
| Acipenser transmontanus | White Sturgeon | Chordata | | | | | | | | | | | | | Acipenser | | Acipenser transmontanus | | | | Not Recorded | SFEI |
| Aclitellata | | Annelida | Aclitellata | | | | | | | | | | | | | | | | | | SAFIT | DFG-ABL |
| Acneus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | | | | Horn | SAFIT | DFG-ABL |
| Acneus beeri | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus beeri | | | Hatch | SAFIT | DFG-ABL |
| Acneus burnelli | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus burnelli | | | (Fender) | SAFIT | DFG-ABL |
| Acneus oregonensis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus oregonensis | | | Fender | SAFIT | DFG-ABL |
| Acneus quadrimaculatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Psephenidae | | | | Acneus | | Acneus quadrimaculatus | | | Horn | SAFIT | DFG-ABL |
| Acricotopus | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Orthocladiinae | | | Acricotopus | | | | | Kieffer | SAFIT | DFG-ABL |
| Acrididae | Short-horned grasshopers | Arthropoda | Hexapoda | | Insecta | | | Orthoptera | Caelifera | | Acrididae | | | | | | | | | | SCCWRP | SCCWRP |
| Acromegalomma | | Annelida | | | Polychaeta | Sedentaria | | Sabellida | | | Sabellidae | | | | Acromegalomma | | | | | Gil & Nishi, 2017 | SAFIT | DFW-ABL |
| Acromegalomma pigmentum | | Annelida | | | Polychaeta | Sedentaria | | Sabellida | | | Sabellidae | | | | Acromegalomma | | Acromegalomma pigmentum | | | (Reish, 1963) | SAFIT | DFW-ABL |
| Acromyrmex | | Arthropoda | Hexapoda | | Insecta | | | Hymenoptera | | | Formicidae | Myrmecinae | | | Acromyrmex | | | | | | SCCWRP | SCCWRP |
| Acromyrmex versicolor | | Arthropoda | Hexapoda | | Insecta | | | Hymenoptera | | | Formicidae | Myrmecinae | | | Acromyrmex | | Acromyrmex versicolor | | | | SCCWRP | SCCWRP |
| Actaletidae | | Arthropoda | Hexapoda | | Collembola | | | Entomobryomorpha | | | Actaletidae | | | | | | | | | | SCCWRP | SCCWRP |
| Acteocina inculta | | Mollusca | Conchifera | | Gastropoda | Orthogastropoda | Heterobranchia | Opisthobranchia | Cephalaspidea | Philinoidea | Cylichnidae | | | | Acteocina | | inculta | | | | SCAMIT | OCSD |
| Acteon traskii | | Mollusca | Conchifera | | Gastropoda | Orthogastropoda | Heterobranchia | "Lower Heterobranchia" | | Acteonoidea | Acteonidae | Acteoninae | | | Acteon | | traskii | | | | SCAMIT | OCSD |
| Actinastrum | | Chlorophyta | | | Trebouxiophyceae | | | Chlorellales | | | Chlorellaceae | | | | Actinastrum | | | | | | CAD_TWG | CSUSM |
| Actinastrum cf hantzschii | | Chlorophyta | | | Trebouxiophyceae | | | Chlorellales | | | Chlorellaceae | | | | Actinastrum | | Actinastrum cf hantzschii | | | Lagerh. | CAD_TWG | CSUSM |
| Actinastrum hantzschii | | Chlorophyta | | | Trebouxiophyceae | | | Chlorellales | | | Chlorellaceae | | | | Actinastrum | | Actinastrum hantzschii | | | Lagerh. | CAD_TWG | CSUSM |
| Actinemys marmorata | Pacific pond turtle | Chordata | Vertebrata | | Reptilia | | | Testudines | | | Emydidae | | | | Actinemys | | Actinemys marmorata | | | ITIS; Baird and Girard 1852 | Not Recorded | MPSL-MLML |
| Actiniaria | | Cnidaria | | | Cnidaria | Zoantharia | | Actiniaria | | | | | | | | | | | | | Not Recorded | MLML-BL |
| Actiniaria sp 1 | | Cnidaria | | | Anthozoa | | | Actiniaria | | | | | | | | | | | | | SCAMIT | DCE |
| Actinocyclus | | Bacillariophyta | | | Coscinodiscophyceae | | | Coscinodiscales | | | Hemidiscaeae | | | | Actinocyclus | | | | | | CAD_TWG | UCOB |
| Actinocyclus normanii | | Bacillariophyta | | | Coscinodiscophyceae | | | Coscinodiscales | | | Hemidiscaeae | | | | Actinocyclus | | Actinocyclus normanii | | | (Gregory) Hustedt | CAD_TWG | UCOB |
| Actinotaenium | | Charophyta | | | Zygnematophyceae | | | Desmidiales | | | Desmidiaceae | | | | Actinotaenium | | | | | | CAD_TWG | CSUSM |
| Actinotaenium colpopelta f minus | | Charophyta | | | Zygnematophyceae | | | Desmidiales | | | Desmidiaceae | | | | Actinotaenium | | Actinotaenium colpopelta | | Actinotaenium colpopelta f minus | (West) Compere | CAD_TWG | CSUSM |
| Actinotaenium cruciferum | | Charophyta | | | Zygnematophyceae | | | Desmidiales | | | Desmidiaceae | | | | Actinotaenium | | Actinotaenium cruciferum | | | (De Bary) Teiling | CAD_TWG | CSUSM |
| Adenophorea | | Nematoda | | | Adenophorea | | | | | | | | | | | | | | | | SAFIT | DFG-ABL |
| Adephaga | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Adephaga | | | | | | | | | | | Schellenberg, 1806 | SAFIT | DFW-ABL |
| Aderidae | Ant-like leaf beetle | Arthropoda | Hexapoda | | Insecta | Pterygota | Holometabola | Coleoptera | Polyphaga | Tenebrionoidea | Aderidae | | | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Adlafia | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | | | | Gerd Moser, Lange-Bertalot & Metzeltin 1998 | CAD_TWG | EcoAnalysts |
| Adlafia aquaeductae | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia aquaeductae | | | (Krasske) Lange-Bertalot | CAD_TWG | CSUSM |
| Adlafia bryophila | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia bryophila | | | (JB Petersen) Moser, Lange-Bertalot & Metzeltin | CAD_TWG | UCOB |
| Adlafia cf bryophila | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia cf bryophila | | | (JB Petersen) Moser, Lange-Bertalot & Metzeltin | CAD_TWG | CSUSM |
| Adlafia cf suchlandtii | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia cf suchlandtii | | | | CAD_TWG | GCSU |
| Adlafia detenta | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia detenta | | | (Hustedt) Heudre, C.E.Wetzel & Ector | CAD_TWG | CSUSM |
| Adlafia langebertalotii | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia langebertalotii | | | Monnier & Ector | CAD_TWG | EcoAnalysts |
| Adlafia minuscula | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia minuscula | | | (Grunow) Lange-Bertalot in Lange-Bertalot & Genkal | CAD_TWG | UCOB |
| Adlafia minuscula var muralis | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia minuscula | | Adlafia minuscula var muralis | (Grunow) Lange-Bertalot in Lange-Bertalot & Genkal | CAD_TWG | UCOB |
| Adlafia suchlandtii | | Bacillariophyta | | | Bacillariophyceae | | | Cymbellales | | | Anomoeoneidaceae | | | | Adlafia | | Adlafia suchlandtii | | | (Hustedt) Moser, Lange-Bertalot & Metzeltin | CAD_TWG | UCOB |
| Aedes | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | | | | Meigen | SAFIT | DFG-ABL |
| Aedes aegypti | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | Aedes aegypti | | | (Linneaus) | SAFIT | DFG-ABL |
| Aedes cinereus | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | Aedes cinereus | | | Meigen | SAFIT | DFG-ABL |
| Aedes vexans | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Culicidae | | | | Aedes | | Aedes vexans | | | (Meigen) | SAFIT | DFG-ABL |
| Aeolidacea | | Mollusca | | | Gastropoda | | | | | | | | | | | | | | | NR | SCAMIT | MPSL-MLML |
| Aeolosoma | | Annelida | Aclitellata | | Polychaeta | Scolecida | | | | | Aeolosomatidae | | | | Aeolosoma | | | | | Ehrenberg | SAFIT | DFG-ABL |
| Aeolosomatidae | | Annelida | Aclitellata | | Polychaeta | Scolecida | | | | | Aeolosomatidae | | | | | | | | | Beddard | SAFIT | DFG-ABL |
| Aeshna | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | | | | Fabricius | SAFIT | DFG-ABL |
| Aeshna canadensis | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna canadensis | | | Walker | SAFIT | DFG-ABL |
| Aeshna constricta | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna constricta | | | Say | SAFIT | DFG-ABL |
| Aeshna eremita | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna eremita | | | Scudder | SAFIT | DFG-ABL |
| Aeshna interrupta | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna interrupta | | | Walker | SAFIT | DFG-ABL |
| Aeshna juncea | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna juncea | | | (Linnaeus) | SAFIT | DFG-ABL |
| Aeshna palmata | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna palmata | | | Hagen | SAFIT | DFG-ABL |
| Aeshna persephone | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna persephone | | | Donnelly | SAFIT | DFG-ABL |
| Aeshna subarctica | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna subarctica | | | Walker | SAFIT | DFG-ABL |
| Aeshna tuberculifera | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna tuberculifera | | | Walker | SAFIT | DFG-ABL |
| Aeshna umbrosa | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna umbrosa | | | Walker | SAFIT | DFG-ABL |
| Aeshna walkeri | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | Aeshna | | Aeshna walkeri | | | Kennedy | SAFIT | DFG-ABL |
| Aeshna/ Rhionaeshna | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | Aeshna/ Rhionaeshna | | | | | | Fabricius/ von Ellenrieder | SAFIT | DFG-ABL |
| Aeshnidae | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Aeshnidae | | | | | | | | | Selys | SAFIT | DFG-ABL |
| Afghanurus | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | | | | Demoulin, 1964 | SAFIT | DFW-ABL |
| Afghanurus criddlei | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | Afghanurus criddlei | | | (McDunnough, 1927) | SAFIT | DFW-ABL |
| Afghanurus kennedyi | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | Afghanurus kennedyi | | | (McDunnough, 1924) | SAFIT | DFW-ABL |
| Afghanurus simplicioides | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Ephemeroptera | | | Heptageniidae | | | | Afghanurus | | Afghanurus simplicioides | | | (McDunnough, 1924) | SAFIT | DFW-ABL |
| Agabinae | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Adephaga | | Dytiscidae | Agabinae | | | | | | | | Thomson, 1867 | SAFIT | DFW-ABL |
| Agabini | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Adephaga | | Dytiscidae | Agabinae | Agabini | | | | | | | Thomson, 1867 | SAFIT | DFW-ABL |
| Agabinus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabinus | | | | | Crotch | SAFIT | DFG-ABL |
| Agabinus glabrellus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabinus | | Agabinus glabrellus | | | (Motschulsky) | SAFIT | DFG-ABL |
| Agabinus sculpturellus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabinus | | Agabinus sculpturellus | | | Zimermann | SAFIT | DFG-ABL |
| Agabus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | | | | Leach | SAFIT | DFG-ABL |
| Agabus ambiguus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus ambiguus | | | (Say) | SAFIT | DFG-ABL |
| Agabus ancillus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus ancillus | | | Fall | SAFIT | DFG-ABL |
| Agabus anthracinus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus anthracinus | | | Mannerheim | SAFIT | DFG-ABL |
| Agabus apache | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus apache | | | Young | SAFIT | DFG-ABL |
| Agabus approximatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus approximatus | | | Fall | SAFIT | DFG-ABL |
| Agabus austinii | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus austinii | | | Sharp | SAFIT | DFG-ABL |
| Agabus austrodiscors | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus austrodiscors | | | Larson | SAFIT | DFG-ABL |
| Agabus bifarius | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus bifarius | | | (Kirby) | SAFIT | DFG-ABL |
| Agabus bjorkmanae | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus bjorkmanae | | | Hatch | SAFIT | DFG-ABL |
| Agabus brevicollis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus brevicollis | | | LeConte | SAFIT | DFG-ABL |
| Agabus canadensis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus canadensis | | | Fall | SAFIT | DFG-ABL |
| Agabus confertus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus confertus | | | LeConte | SAFIT | DFG-ABL |
| Agabus cordatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus cordatus | | | (LeConte) | SAFIT | DFG-ABL |
| Agabus discors | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus discors | | | LeConte | SAFIT | DFG-ABL |
| Agabus disintegratus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus disintegratus | | | (Crotch) | SAFIT | DFG-ABL |
| Agabus erichsoni | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus erichsoni | | | Gemminger and Harold | SAFIT | DFG-ABL |
| Agabus euryomus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus euryomus | | | Larson | SAFIT | DFG-ABL |
| Agabus griseipennis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus griseipennis | | | LeConte | SAFIT | DFG-ABL |
| Agabus hoppingi | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus hoppingi | | | Leech | SAFIT | DFG-ABL |
| Agabus hypomelas | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus hypomelas | | | Mannerheim | SAFIT | DFG-ABL |
| Agabus ilybiiformis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus ilybiiformis | | | (Zimmermann) | SAFIT | DFG-ABL |
| Agabus jimzim | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus jimzim | | | Larson | SAFIT | DFG-ABL |
| Agabus klamathensis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus klamathensis | | | Larson & Leech | SAFIT | DFG-ABL |
| Agabus kootenai | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus kootenai | | | Larson | SAFIT | DFG-ABL |
| Agabus lineelus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus lineelus | | | LeConte | SAFIT | DFG-ABL |
| Agabus lugens | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus lugens | | | LeConte | SAFIT | DFG-ABL |
| Agabus lutosus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus lutosus | | | LeConte | SAFIT | DFG-ABL |
| Agabus minnesotensis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus minnesotensis | | | Wallis | SAFIT | DFG-ABL |
| Agabus morosus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus morosus | | | LeConte | SAFIT | DFG-ABL |
| Agabus obliteratus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus obliteratus | | | LeConte | SAFIT | DFG-ABL |
| Agabus oblongulus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus oblongulus | | | Fall | SAFIT | DFG-ABL |
| Agabus obsoletus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus obsoletus | | | LeConte | SAFIT | DFG-ABL |
| Agabus pandurus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus pandurus | | | Leech | SAFIT | DFG-ABL |
| Agabus perplexus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus perplexus | | | Sharp | SAFIT | DFG-ABL |
| Agabus pisobius | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus pisobius | | | Leech | SAFIT | DFG-ABL |
| Agabus punctulatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus punctulatus | | | Aube | SAFIT | DFG-ABL |
| Agabus regularis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus regularis | | | LeConte | SAFIT | DFG-ABL |
| Agabus roguus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus roguus | | | Larson | SAFIT | DFG-ABL |
| Agabus rumppi | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus rumppi | | | Leech | SAFIT | DFG-ABL |
| Agabus sasquatch | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus sasquatch | | | Larson | SAFIT | DFG-ABL |
| Agabus semipunctatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus semipunctatus | | | (Kirby) | SAFIT | DFG-ABL |
| Agabus semivittatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus semivittatus | | | LeConte | SAFIT | DFG-ABL |
| Agabus seriatus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus seriatus | | | (Say) | SAFIT | DFG-ABL |
| Agabus smithi | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus smithi | | | Brown | SAFIT | DFG-ABL |
| Agabus strigulosus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus strigulosus | | | (Crotch) | SAFIT | DFG-ABL |
| Agabus tristis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus tristis | | | Aubé | SAFIT | DFG-ABL |
| Agabus vancouverensis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus vancouverensis | | | Leech | SAFIT | DFG-ABL |
| Agabus vandykei | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus vandykei | | | Leech | SAFIT | DFG-ABL |
| Agabus versimilis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus versimilis | | | Brown | SAFIT | DFG-ABL |
| Agabus walsinghami | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Dytiscidae | Colymbetinae | | | Agabus | | Agabus walsinghami | | | (Crotch) | SAFIT | DFG-ABL |
| Agapetus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | | | | Curtis | SAFIT | DFG-ABL |
| Agapetus arcita | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus arcita | | | Denning | SAFIT | DFG-ABL |
| Agapetus bifidus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus bifidus | | | Denning | SAFIT | DFG-ABL |
| Agapetus boulderensis | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus boulderensis | | | Milne | SAFIT | DFG-ABL |
| Agapetus celatus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus celatus | | | MacLachlan | SAFIT | DFG-ABL |
| Agapetus cornutus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus cornutus | | | Denning | SAFIT | DFG-ABL |
| Agapetus denningi | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus denningi | | | Ross | SAFIT | DFG-ABL |
| Agapetus joannia | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus joannia | | | Denning | SAFIT | DFG-ABL |
| Agapetus malleatus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus malleatus | | | Banks | SAFIT | DFG-ABL |
| Agapetus marlo | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus marlo | | | Milne | SAFIT | DFG-ABL |
| Agapetus occidentis | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus occidentis | | | Denning | SAFIT | DFG-ABL |
| Agapetus orosus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus orosus | | | Denning | SAFIT | DFG-ABL |
| Agapetus taho | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Glossosomatidae | | | | Agapetus | | Agapetus taho | | | Ross | SAFIT | DFG-ABL |
| Agasicles | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Chrysomelidae | | | | Agasicles | | | | | | SAFIT | DFG-ABL |
| Agasicles hygrophila | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Chrysomelidae | | | | Agasicles | | Agasicles hygrophila | | | | SAFIT | DFG-ABL |
| Agathon | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | | | | Röder | SAFIT | DFG-ABL |
| Agathon arizonica | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon arizonica | | | (Alexander) | SAFIT | DFG-ABL |
| Agathon aylmeri | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon aylmeri | | | (Garrett) | SAFIT | DFG-ABL |
| Agathon aylmeri group | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | | | | | SAFIT | DFG-ABL |
| Agathon comstocki | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | Agathon comstocki | | | (Kellogg) | SAFIT | DFG-ABL |
| Agathon dismalea | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon dismalea | | | (Hogue) | SAFIT | DFG-ABL |
| Agathon doanei | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | Agathon doanei | | | (Kellogg) | SAFIT | DFG-ABL |
| Agathon elegantulus | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | | | | Agathon | | Agathon elegantulus | | | von Röder | SAFIT | DFG-ABL |
| Agathon markii | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon markii | | | (Garrett) | SAFIT | DFG-ABL |
| Agathon sequoiarum | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Blephariceridae | Blepharicerinae | | | Agathon | Agathon aylmeri group | Agathon sequoiarum | | | (Alexander) | SAFIT | DFG-ABL |
| Agelenidae | Funnel weaver spider | Arthropoda | Chelicerata | | Euchelicerata | Arachnida | | Araneae | | | Agelenidae | | | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Aglaja ocelligera | | Mollusca | Conchifera | | Gastropoda | Orthogastropoda | Heterobranchia | Opisthobranchia | Cephalaspidea | Philinoidea | Aglajidae | | | | Aglaja | | ocelligera | | | | SCAMIT | OCSD |
| Agna | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Polyphaga | | Hydrophilidae | Sphaeridiinae | Megasternini | | Agna | | | | | Smetana, 1978 | SAFIT | DFW-ABL |
| Agna capillata | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Coleoptera | Polyphaga | | Hydrophilidae | Sphaeridiinae | Megasternini | | Agna | | Agna capillata | | | (LeConte, 1855) | SAFIT | DFW-ABL |
| Agraylea | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Agraylea | | | | | Curtis | SAFIT | DFG-ABL |
| Agraylea multipunctata | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Agraylea | | Agraylea multipunctata | | | Curtis | SAFIT | DFG-ABL |
| Agraylea saltesea | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Agraylea | | Agraylea saltesea | | | Ross | SAFIT | DFG-ABL |
| Agrypnia | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | | | | Curtis | SAFIT | DFG-ABL |
| Agrypnia dextra | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia dextra | | | Ross | SAFIT | DFG-ABL |
| Agrypnia glacialis | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia glacialis | | | Hagen | SAFIT | DFG-ABL |
| Agrypnia improba | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia improba | | | (Hagen) | SAFIT | DFG-ABL |
| Agrypnia pagetana | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia pagetana | | | Curis | SAFIT | DFG-ABL |
| Agrypnia vestita | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Phryganeidae | | | | Agrypnia | | Agrypnia vestita | | | (Walker) | SAFIT | DFG-ABL |
| Agulla | | Arthropoda | Hexapoda | | Insecta | | | Raphidoptera | | | Raphidiidae | | | | Agulla | | | | | | SCCWRP | SCCWRP |
| Agyrtidae | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | Polyphaga | Staphylinoidea | Agyrtidae | | | | | | | | | | SCCWRP | SCCWRP |
| Alaudes | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | Polyphaga | Tenebrionoidea | Tenebrionidae | Pimeliinae | | | Alaudes | | | | | | SCCWRP | SCCWRP |
| Alaudes singularis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | Polyphaga | Tenebrionoidea | Tenebrionidae | Pimeliinae | | | Alaudes | | Alaudes singularis | | | | SCCWRP | SCCWRP |
| Albertathyas | | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | Prostigmata | Anystina | Hydryphantidae | | | | Albertathyas | | | | | Smith and Cook, 1998 | SAFIT | DFW-ABL |
| Albia | | Arthropoda | Chelicerata | | Arachnida | Acari | | Trombidiformes | | | Axonopsidae | | | | Albia | | | | | | SAFIT | DFG-ABL |
| Albula gilberti | Cortez Bonefish | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Albuliformes | | | Albulidae | | | | Albula | | Albula gilberti | | | | Not Recorded | MPSL-DFW |
| Alena | | Arthropoda | Hexapoda | | Insecta | | | Raphidoptera | | | Raphidiidae | | | | Alena | | | | | | SCCWRP | SCCWRP |
| Aleyrodidae | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | Sternorrhynca | Aleyrodoidea | Aleyrodidae | | | | | | | | | | SCCWRP | SCCWRP |
| Aleyrodoidea | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | Sternorrhynca | Aleyrodoidea | | | | | | | | | | | SCCWRP | SCCWRP |
| Alienacanthomysis | | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Alienacanthomysis | | | | | Holmquist | SAFIT | DFG-ABL |
| Alienacanthomysis macropsis | | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Alienacanthomysis | | Alienacanthomysis macropsis | | | Tattersall | SAFIT | DFG-ABL |
| Alisotrichia | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Alisotrichia | | | | | Flint | SAFIT | DFG-ABL |
| Alisotrichia arizonica | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Hydroptilidae | | | | Alisotrichia | | Alisotrichia arizonica | | | (Blickle & Denning) | SAFIT | DFG-ABL |
| Alitta | | Annelida | | | Polychaeta | Errantia | | Phyllodocida | | | Nereididae | | | | Alitta | | | | | Kinberg, 1865 | SAFIT | DFW-ABL |
| Alitta succinea | | Annelida | | | Polychaeta | Errantia | | Phyllodocida | | | Nereididae | | | | Alitta | | Alitta succinea | | | (Leuckart, 1847) | SAFIT | DFW-ABL |
| Allocosmoecus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Allocosmoecus | | | | | Banks | SAFIT | DFG-ABL |
| Allocosmoecus partitus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Allocosmoecus | | Allocosmoecus partitus | | | Banks | SAFIT | DFG-ABL |
| Allomyia | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | | | | Banks | SAFIT | DFG-ABL |
| Allomyia acanthis | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia acanthis | | | (Ross) | SAFIT | DFG-ABL |
| Allomyia cascadis | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia cascadis | | | (Ross) | SAFIT | DFG-ABL |
| Allomyia cidoipes | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia cidoipes | | | (Schmid) | SAFIT | DFG-ABL |
| Allomyia picoides | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Trichoptera | Integrapalpia | | Apataniidae | | | | Allomyia | | Allomyia picoides | | | (Ross, 1950) | SAFIT | DFW-ABL |
| Allomyia renoa | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia renoa | | | (Milne) | SAFIT | DFG-ABL |
| Allomyia tripunctata | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Apataniidae | | | | Allomyia | | Allomyia tripunctata | | | (Banks) | SAFIT | DFG-ABL |
| Alloperla | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | | | | Banks | SAFIT | DFG-ABL |
| Alloperla chandleri | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla chandleri | | | Jewett | SAFIT | DFG-ABL |
| Alloperla delicata | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla delicata | | | Frison | SAFIT | DFG-ABL |
| Alloperla elevata | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla elevata | | | Frison | SAFIT | DFG-ABL |
| Alloperla fraterna | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla fraterna | | | Frison | SAFIT | DFG-ABL |
| Alloperla serrata | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla serrata | | | Needham and Claassen | SAFIT | DFG-ABL |
| Alloperla severa | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla severa | | | (Hagen) | SAFIT | DFG-ABL |
| Alloperla thalia | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Chloroperlidae | | | | Alloperla | | Alloperla thalia | | | Ricker | SAFIT | DFG-ABL |
| Allotrichoma | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Ephydridae | | | | Allotrichoma | | | | | Becker | SAFIT | DFG-ABL |
| Alluaudomyia | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Ceratopogonidae | Ceratopogoninae | | | Alluaudomyia | | | | | Kieffer | SAFIT | DFG-ABL |
| Aloina | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Aloina | | | | | | CSUMB-WEE | CSUMB-WEE |
| Aloina ambigua | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Aloina | | Aloina ambigua | | | | CSUMB-WEE | CSUMB-WEE |
| Aloina bifrons | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Aloina | | Aloina bifrons | | | | CSUMB-WEE | CSUMB-WEE |
| Aloina rigida | | Bryophyta | | | Bryopsida | Dicranidae | | Pottiales | | | Pottiaceae | | | | Aloina | | Aloina rigida | | | | CSUMB-WEE | CSUMB-WEE |
| Alona | | Arthropoda | Crustacea | | Branchiopoda | | | Cladocera | | | Chydoridae | | | | Alona | | | | | | SAFIT | DFG-ABL |
| Alona guttata | | Arthropoda | Crustacea | Allotriocarida | Branchiopoda | Phyllopoda | Diplostraca | Anomopoda | | | Chydoridae | | | | Alona | | Alona guttata | | | | Not Recorded | BSA_Env |
| Alonella excisa | | Arthropoda | Crustacea | Allotriocarida | Branchiopoda | | | Anomopoda | Cladocera | | Chydoridae | | | | Alonella | | Alonella excisa | | | | Not Recorded | BSA_Env |
| Alopecosa | Wolf spider | Arthropoda | Chelicerata | | Euchelicerata | Arachnida | | Araneae | | | Lycosidae | | | | Alopecosa | | | | | | CSUMB-WEE | CSUMB-WEE |
| Alopias vulpinus | Pacific Common Thresher Shark | Chordata | Vertebrata | Gnathostomata | Chondrichthyes | Elasmobranchii | | Lamniformes | | | Alopiidae | | | | Alopias | | Alopias vulpinus | | | Bonnaterre | Not Recorded | MPSL-DFW |
| Alosa sapidissima | American Shad | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Clupeiformes | | | Clupeidae | | | | Alosa | | Alosa sapidissima | | | | Not Recorded | OSPR |
| Alotanypus | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Alotanypus | | | | | Roback | SAFIT | DFG-ABL |
| Alotanypus venustus | | Arthropoda | Hexapoda | | Insecta | | | Diptera | | | Chironomidae | Tanypodinae | Macropelopiini | | Alotanypus | | Alotanypus venustus | | | (Coquillett) | SAFIT | DFG-ABL |
| Alticinae | Flea beetle | Arthropoda | Hexapoda | | Insecta | Pterygota | Holometabola | Coleoptera | Polyphaga | Chrysomeloidea | Chrysomelidae | Alticinae | | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Alticini | Flea beetle | Arthropoda | Hexapoda | | Insecta | Pterygota | Holometabola | Coleoptera | Polyphaga | Chrysomeloidea | Chrysomelidae | Galerucinae | Alticini | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Altmanella | | Annelida | | | Clitellata | Oligochaeta | | Lumbriculida | | | Lumbriculidae | | | | Altmanella | | | | | Fend, 2009 | SAFIT | DFW-ABL |
| Altmanella freidris | | Annelida | | | Clitellata | Oligochaeta | | Lumbriculida | | | Lumbriculidae | | | | Altmanella | | Altmanella freidris | | | (Cook, 1966) | SAFIT | DFW-ABL |
| Alydidae | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | Heteroptera | Coreoidea | Alydidae | | | | | | | | | | SCCWRP | SCCWRP |
| Amaeana | | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Terebellidae | | | | Amaeana | | | | | Hartman, 1959 | SAFIT | DFW-ABL |
| Amaeana occidentalis | | Annelida | Aclitellata | | Polychaeta | | | Terebellida | | | Terebellidae | | | | Amaeana | | Amaeana occidentalis | | | (Hartman 1944) | Not Recorded | ISS |
| Amaeana sp A | | Annelida | | | Polychaeta | Palpata | | Canalipalpata | Terebellida | Terebelliformia | Terebellidae | Polycirrinae | | | Amaeana | | Amaeana sp A | | | Harris, L., 2004 | Not Recorded | MLML-BL |
| Amage scutata | | Annelida | | | Polychaeta | Sedentaria | | Terebellida | Terebellimorpha | | Ampharetidae | Ampharetinae | | | Amage | | Amage scutata | | | SCAMIT Ed. 13 | SCAMIT | LACSD |
| Amathia distans | | Bryozoa | | | Gymnolaemata | | | Ctenostomtida | | | Vesiculariidae | | | | Amathia | | distans | | | | WoRMS | CCSF-OBL |
| Amaurobiidae | Hacklemesh weaver | Arthropoda | Chelicerata | | Euchelicerata | Arachnida | | Araneae | | | Amaurobiidae | | | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Amblyopone | | Arthropoda | Hexapoda | | Insecta | | | Hymenoptera | | | Formicidae | Amblyoponinae | | | Amblyopone | | | | | | SCCWRP | SCCWRP |
| Amblyopone oregonensis | | Arthropoda | Hexapoda | | Insecta | | | Hymenoptera | | | Formicidae | Amblyoponinae | | | Amblyopone | | Amblyopone oregonensis | | | | SCCWRP | SCCWRP |
| Amblyopone pallidus | | Arthropoda | Hexapoda | | Insecta | | | Hymenoptera | | | Formicidae | Amblyoponinae | | | Amblyopone | | Amblyopone pallidus | | | | SCCWRP | SCCWRP |
| Amblyoponinae | | Arthropoda | Hexapoda | | Insecta | | | Hymenoptera | | | Formicidae | Amblyoponinae | | | | | | | | | SCCWRP | SCCWRP |
| Amblystegiaceae | | Bryophyta | | | Bryopsida | Bryidae | | Hypnales | | | Amblystegiaceae | | | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Amblystegium | | Bryophyta | | | Bryopsida | Bryidae | | Hypnales | | | Amblystegiaceae | | | | | | | | | | CSUMB-WEE | CSUMB-WEE |
| Amblystegium juratzkanum | | Bryophyta | | | Bryopsida | Bryidae | | Hypnales | | | Amblystegiaceae | | | | Amblystegium | | Amblystegium juratzkanum | | | | CSUMB-WEE | CSUMB-WEE |
| Amblystegium radicale | | Bryophyta | | | Bryopsida | Bryidae | | Hypnales | | | Amblystegiaceae | | | | Amblystegium | | Amblystegium radicale | | | | CSUMB-WEE | CSUMB-WEE |
| Amblystegium serpens | | Bryophyta | | | Bryopsida | Bryidae | | Hypnales | | | Amblystegiaceae | | | | Amblystegium | | Amblystegium serpens | | | | CSUMB-WEE | CSUMB-WEE |
| Amblystegium varium | | Bryophyta | | | Bryopsida | Bryidae | | Hypnales | | | Amblystegiaceae | | | | Amblystegium | | Amblystegium varium | | | | CSUMB-WEE | CSUMB-WEE |
| Ambrysus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | | | | Stal | SAFIT | DFG-ABL |
| Ambrysus amargosus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus amargosus | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus arizonus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus arizonus | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus californicus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus californicus | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus circumcinctus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus circumcinctus | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus funebris | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus funebris | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus melanopterus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus melanopterus | | | Stal | SAFIT | DFG-ABL |
| Ambrysus mormon | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus mormon | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus occidentalis | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus occidentalis | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus pudicus | | Arthropoda | Hexapoda | | Insecta | Pterygota | | Hemiptera | Heteroptera | Nepomorpha | Naucoridae | Ambrysinae | | | Ambrysus | | Ambrysus pudicus | | | Stal, 1862 | SAFIT | DFW-ABL |
| Ambrysus pulchellus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus pulchellus | | | Montandon | SAFIT | DFG-ABL |
| Ambrysus puncticollis | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus puncticollis | | | Stal | SAFIT | DFG-ABL |
| Ambrysus relictus | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus relictus | | | Polhemus and Polhemus | SAFIT | DFG-ABL |
| Ambrysus thermarum | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus thermarum | | | La Rivers | SAFIT | DFG-ABL |
| Ambrysus woodburyi | | Arthropoda | Hexapoda | | Insecta | | | Hemiptera | | | Naucoridae | | | | Ambrysus | | Ambrysus woodburyi | | | Usinger | SAFIT | DFG-ABL |
| Ambystoma californiense | California tiger salamander | Chordata | | | Amphibia | | | Caudata | | | Salamandridae | | | | Ambystoma | | Ambystoma californiense | | | | Not Recorded | MPSL-MLML |
| Ambystoma macrodactylum | long-toed salamander | Chordata | Vertebrata | | Amphibia | | | Caudata | | | Ambystomatidae | | | | Ambystoma | | Ambystoma macrodactylum | | | ITIS; Baird 1850 | Not Recorded | MPSL-MLML |
| Ameiurus | Bullhead sp. | Chordata | | | | | | | | | | | | | Ameiurus | | | | | | Not Recorded | SFEI |
| Ameiurus catus | White Catfish | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Siluriformes | | | Ictaluridae | | | | Ameiurus | | Ameiurus catus | | | | Not Recorded | OSPR |
| Ameiurus melas | Black Bullhead | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Siluriformes | | | Ictaluridae | | | | Ameiurus | | Ameiurus melas | | | | Not Recorded | OSPR |
| Ameiurus natalis | Yellow Bullhead | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Siluriformes | | | Ictaluridae | | | | Ameiurus | | Ameiurus natalis | | | | Not Recorded | OSPR |
| Ameiurus nebulosus | Brown Bullhead | Chordata | Vertebrata | Osteichthyes | Actinopterygii | | | Siluriformes | | | Ictaluridae | | | | Ameiurus | | Ameiurus nebulosus | | | | Not Recorded | OSPR |
| Ameletidae | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | | | | | | McCafferty | SAFIT | DFG-ABL |
| Ameletus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | | | | Eaton | SAFIT | DFG-ABL |
| Ameletus amador | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus amador | | | Mayo | SAFIT | DFG-ABL |
| Ameletus andersoni | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus andersoni | | | Zloty | SAFIT | DFG-ABL |
| Ameletus bellulus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus bellulus | | | Zloty | SAFIT | DFG-ABL |
| Ameletus celer | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus celer | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus cooki | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus cooki | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus dissitus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus dissitus | | | Eaton | SAFIT | DFG-ABL |
| Ameletus doddsianus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus doddsianus | | | Zloty | SAFIT | DFG-ABL |
| Ameletus edmundsi | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus edmundsi | | | Zloty | SAFIT | DFG-ABL |
| Ameletus exquisitus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus exquisitus | | | Eaton | SAFIT | DFG-ABL |
| Ameletus falsus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus falsus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus imbellis | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus imbellis | | | Day | SAFIT | DFG-ABL |
| Ameletus majusculus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus majusculus | | | Zloty | SAFIT | DFG-ABL |
| Ameletus minumus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus minumus | | | Zloty and Harper | SAFIT | DFG-ABL |
| Ameletus oregonensis | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus oregonensis | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus pritchardi | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus pritchardi | | | Zloty | SAFIT | DFG-ABL |
| Ameletus quadratus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus quadratus | | | Zloty and Harper | SAFIT | DFG-ABL |
| Ameletus shepardi | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus shepardi | | | Traver | SAFIT | DFG-ABL |
| Ameletus similior | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus similior | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus sparsatus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus sparsatus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus subnotatus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus subnotatus | | | Eaton | SAFIT | DFG-ABL |
| Ameletus suffusus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus suffusus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus tolae | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus tolae | | | Zloty | SAFIT | DFG-ABL |
| Ameletus validus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus validus | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus vancouverensis | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus vancouverensis | | | McDunnough | SAFIT | DFG-ABL |
| Ameletus velox | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus velox | | | Dodds | SAFIT | DFG-ABL |
| Ameletus vernalis | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ameletidae | | | | Ameletus | | Ameletus vernalis | | | McDunnough | SAFIT | DFG-ABL |
| Amelidae | | Arthropoda | Hexapoda | | Insecta | | | Mantodea | | | Amelidae | | | | | | | | | | SCCWRP | SCCWRP |
| Americamysis bahia | | Arthropoda | Crustacea | | Malacostraca | | | Mysida | | | Mysidae | | | | Americamysis | | Americamysis bahia | | | | Not Recorded | UCD-GC |
| Americorophium | | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | | | | Bousfield and Hoover | SAFIT | DFG-ABL |
| Americorophium brevis | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium brevis | | | (Shoemaker, 1949) | SAFIT | DFW-ABL |
| Americorophium lacustre | | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium lacustre | | | Vanhoffen | SAFIT | DFG-ABL |
| Americorophium salmonis | | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium salmonis | | | (Stimpson) | SAFIT | DFG-ABL |
| Americorophium spinicorne | | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium spinicorne | | | (Stimpson) | SAFIT | DFG-ABL |
| Americorophium stimpsoni | | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | Corophiidae | | | | Americorophium | | Americorophium stimpsoni | | | (Shoemaker) | SAFIT | DFG-ABL |
| Ameronothridae | | Arthropoda | Chelicerata | | Arachnida | Acari | | Sarcoptiformes | Oribatida | Desmonomata | Ameronothridae | | | | | | | | | Willmann, 1931 | SAFIT | DFW-ABL |
| Ametor | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Ametor | | | | | Semenov | SAFIT | DFG-ABL |
| Ametor latus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Ametor | | Ametor latus | | | (Horn) | SAFIT | DFG-ABL |
| Ametor scabrosus | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Hydrophilidae | | | | Ametor | | Ametor scabrosus | | | (Horn) | SAFIT | DFG-ABL |
| Ametropodidae | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ametropodidae | | | | | | | | | Bengtsson | SAFIT | DFG-ABL |
| Ametropus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ametropodidae | | | | Ametropus | | | | | Albarda | SAFIT | DFG-ABL |
| Ametropus ammophilus | | Arthropoda | Hexapoda | | Insecta | | | Ephemeroptera | | | Ametropodidae | | | | Ametropus | | Ametropus ammophilus | | | Allen and Edmunds | SAFIT | DFG-ABL |
| Amiocentrus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Brachycentridae | | | | Amiocentrus | | | | | Ross | SAFIT | DFG-ABL |
| Amiocentrus aspilus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Brachycentridae | | | | Amiocentrus | | Amiocentrus aspilus | | | (Ross) | SAFIT | DFG-ABL |
| Amnicola | | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Amnicolidae | | | | Amnicola | | | | | Gould and Haldeman | SAFIT | DFG-ABL |
| Amnicola limosa | | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Amnicolidae | | | | Amnicola | | Amnicola limosa | | | (Say) | SAFIT | DFG-ABL |
| Amnicolidae | | Mollusca | | | Gastropoda | Prosobranchia | | Hypsogastropoda | | | Amnicolidae | | | | | | | | | Tryon | SAFIT | DFG-ABL |
| Ampelisca abdita | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | Gammaridea | Ampeliscoidea | Ampeliscidae | | | | Ampelisca | | Ampelisca abdita | | | | Not Recorded | |
| Ampelisca brachycladus | | Arthropoda | | | Malacostraca | | | Amphipoda | | | Ampeliscidae | | | | Ampelisca | | brachycladus | | | Roney 1990 | SCAMIT | MPSL-MLML |
| Ampelisca cristata cristata | | Arthropoda | | | Malacostraca | | | Amphipoda | | | Ampeliscidae | | | | Ampelisca | | cristata | cristata | | Holmes 1908 | SCAMIT | MPSL-MLML |
| Ampelisca cristata microdentata | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | Gammaridea | Ampeliscoidea | Ampeliscidae | | | | Ampelisca | | cristata microdentata | | | | SCAMIT | OCSD |
| Ampelisca lobata | | Arthropoda | | | Malacostraca | | | Amphipoda | | | Ampeliscidae | | | | Ampelisca | | lobata | | | | WoRMS | Not Recorded |
| Ampharete | | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Ampharetidae | | | | Ampharete | | | | | Malmgren, 1866 | SAFIT | DFW-ABL |
| Ampharete labrops | | Annelida | Aclitellata | | Polychaeta | | | Terebellida | | | Ampharetidae | Ampharetinae | | | Ampharete | | Ampharete labrops | | | Hartman 1961 | Not Recorded | ISS |
| Ampharete manriquei | | Annelida | | | Polychaeta | Sedentaria | | Terebellida | Terebellimorpha | | Ampharetidae | Ampharetinae | | | Ampharete | | Ampharete manriquei | | | SCAMIT Ed. 13 | SCAMIT | LACSD |
| Ampharetidae | | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Ampharetidae | | | | | | | | | Malmgren, 1866 | SAFIT | DFW-ABL |
| Amphiagrion | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Amphiagrion | | | | | Selys | SAFIT | DFG-ABL |
| Amphiagrion abbreviatum | | Arthropoda | Hexapoda | | Insecta | | | Odonata | | | Coenagrionidae | | | | Amphiagrion | | Amphiagrion abbreviatum | | | (Selys) | SAFIT | DFG-ABL |
| Amphibia | | Chordata | Vertebrata | Tetrapoda | Amphibia | | | | | | | | | | | | | | | | Not Recorded | MPSL-MLML |
| Amphicosmoecus | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Amphicosmoecus | | | | | Schmid | SAFIT | DFG-ABL |
| Amphicosmoecus canax | | Arthropoda | Hexapoda | | Insecta | | | Trichoptera | | | Limnephilidae | | | | Amphicosmoecus | | Amphicosmoecus canax | | | (Ross) | SAFIT | DFG-ABL |
| Amphicteis | | Annelida | | | Polychaeta | Sedentaria | | Terebellida | | | Ampharetidae | | | | Amphicteis | | | | | Grube, 1850 | SAFIT | DFW-ABL |
| Amphicteis scaphobranchiata | | Annelida | Aclitellata | | Polychaeta | | | Terebellida | | | Ampharetidae | | | | Amphicteis | | Amphicteis scaphobranchiata | | | | Not Recorded | ISS |
| Amphideutopus oculatus | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | Gammaridea | Corophioidea | Isaeidae | | | | Amphideutopus | | Amphideutopus oculatus | | | J. L. Barnard and Reish, 1959 | Not Recorded | ISS |
| Amphidorini | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | Polyphaga | Tenebrionoidea | Tenebrionidae | Tenebrioninae | Amphidorini | | | | | | | | SCCWRP | SCCWRP |
| Amphinectidae | | Arthropoda | | | Arachnida | | | Araneae | | | Amphinectidae | | | | | | | | | | SCCWRP | SCCWRP |
| Amphinemura | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | | | | Ris | SAFIT | DFG-ABL |
| Amphinemura apache | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | Amphinemura apache | | | Baumann and Gaufin | SAFIT | DFG-ABL |
| Amphinemura mogollonica | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | Amphinemura mogollonica | | | Baumann and Gaufin | SAFIT | DFG-ABL |
| Amphinemura venusta | | Arthropoda | Hexapoda | | Insecta | | | Plecoptera | | | Nemouridae | | | | Amphinemura | | Amphinemura venusta | | | (Banks) | SAFIT | DFG-ABL |
| Amphiodia | | Echinodermata | | | Ophiuroidea | | | Monostilifera | | | Amphiodia | | | | | | | | | | WoRMS | MLML_Oakden |
| Amphiodia digitata | | Echinodermata | | | Ophiuroidea | | | Ophiurida | | | Amphiuridae | | | | Amphiodia | | Amphiodia digitata | | | | Not Recorded | ISS |
| Amphiodia urtica | | Echinodermata | Asterozoa | | Ophiuroidea | Ophiuridea | | Ophiurida | Chilophiurina | Gnathophiuridea | Amphiuridae | | | | Amphiodia | | urtica | | | | SCAMIT | OCSD |
| Amphipholis squamata | | Echinodermata | | | Ophiuroidea | | | Ophiurida | Gnathophiurina | | Amphiuridae | | | | Amphipholis | | Amphipholis squamata | | | (Delle Chiaje, 1828) | Not Recorded | ISS |
| Amphipleura | | Bacillariophyta | | | Bacillariophyceae | | | Naviculales | | | Amphipleuraceae | | | | Amphipleura | | | | | | CAD_TWG | UCOB |
| Amphipleura pellucida | | Bacillariophyta | | | Bacillariophyceae | | | Naviculales | | | Amphipleuraceae | | | | Amphipleura | | Amphipleura pellucida | | | (Kutzing) Kutzing | CAD_TWG | UCOB |
| Amphipoda | | Arthropoda | Crustacea | | Malacostraca | | | Amphipoda | | | | | | | | | | | | Latreille | SAFIT | DFG-ABL |
| Amphisamytha bioculata | | Annelida | | | Polychaeta | | | Terebellida | | | Ampharetidae | | | | Amphisamytha | | Amphisamytha bioculata | | | | SCAMIT | AnchorQEA |
| Amphistichus argenteus | Barred Surfperch | Chordata | | | | | | | | | | | | | Amphistichus | | Amphistichus argenteus | | | | Not Recorded | SFEI |
| Amphistichus koelzi | Calico surfperch | Chordata | Vertebrata | | Actinopterygii | | | Perciformes | | | Embiotocidae | | | | Amphistichus | | Amphistichus koelzi | | | | Not Recorded | MPSL-DFW |
| Amphistichus rhodoterus | Redtail Surfperch | Chordata | | | | | | | | | | | | | Amphistichus | | Amphistichus rhodoterus | | | | Not Recorded | SFEI |
| Amphitrite robusta | | Annelida | | | Polychaeta | Palpata | | Canalipalpata | Terebellida | | Terebellidae | Terebellinae | | | Amphitrite | | robusta | | | | SCAMIT | OCSD |
| Amphiuridae | | Echinodermata | | | Ophiuroidea | | | Ophiurida | | | Amphiuridae | | | | | | | | | | WoRMS | Not Recorded |
| Amphizoa | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | | | | LeConte | SAFIT | DFG-ABL |
| Amphizoa insolens | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | Amphizoa insolens | | | LeConte | SAFIT | DFG-ABL |
| Amphizoa lecontei | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | Amphizoa lecontei | | | Matthews | SAFIT | DFG-ABL |
| Amphizoa striata | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | Amphizoa | | Amphizoa striata | | | Van Dyke | SAFIT | DFG-ABL |
| Amphizoidae | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Amphizoidae | | | | | | | | | LeConte | SAFIT | DFG-ABL |
| Amphora | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | | | | | CAD_TWG | UCOB |
| Amphora aequalis | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora aequalis | | | Krammer | CAD_TWG | NAU |
| Amphora affinis | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora affinis | | | Kutzing | CAD_TWG | EcoAnalysts |
| Amphora cf inariensis | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora cf inariensis | | | | CAD_TWG | CSUSM |
| Amphora cf micra | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora cf micra | | | Levkov | CAD_TWG | CSUSM |
| Amphora copulata | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora copulata | | | (Kutzing) Schoeman & Archibald | CAD_TWG | UCOB |
| Amphora copulatoides | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora copulatoides | | | Stepanek et Kociolek | CAD_TWG | CSUSM |
| Amphora inariensis | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora inariensis | | | Krammer | CAD_TWG | UCOB |
| Amphora indistincta | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora indistincta | | | Levkov | CAD_TWG | CSUSM |
| Amphora libyca | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora libyca | | | Ehrenberg | CAD_TWG | UCOB |
| Amphora micra | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora micra | | | | CAD_TWG | CSUSM |
| Amphora minutissima | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora minutissima | | | W. Smith | CAD_TWG | UCOB |
| Amphora ovalis | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora ovalis | | | (Kutzing) Kutzing | CAD_TWG | UCOB |
| Amphora pediculus | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora pediculus | | | (Kutzing) Grunow in Schmidt et al | CAD_TWG | UCOB |
| Amphora stoermeri | | Bacillariophyta | | | Bacillariophyceae | | | Thalassiophysales | | | Catenulaceae | | | | Amphora | | Amphora stoermerii | | | Edlund & Levkov in Levkov | CAD_TWG | CSUSM |
| Ampithoe | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | Gammaridea | Corophioidea | Ampithoidae | Ampithoinae | | | Ampithoe | | | | | Smith, 1873 | Not Recorded | MLML-BL |
| Ampithoe lacertosa | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | Gammaridea | Corophioidea | Ampithoidae | Ampithoinae | | | Ampithoe | | lacertosa | | | | SCAMIT | OCSD |
| Ampithoe plumulosa | | Arthropoda | Crustacea | | Malacostraca | Eumalacostraca | Peracarida | Amphipoda | Gammaridea | Corophioidea | Ampithoidae | Ampithoinae | | | Ampithoe | | plumulosa | | | | SCAMIT | OCSD |
| Ampullariidae | | Mollusca | | | Gastropoda | Prosobranchia | | Architaenioglossa | | | Ampullariidae | | | | | | | | | Gray | SAFIT | DFG-ABL |
| Ampumixis | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Elmidae | | | | Ampumixis | | | | | Sanderson | SAFIT | DFG-ABL |
| Ampumixis dispar | | Arthropoda | Hexapoda | | Insecta | | | Coleoptera | | | Elmidae | | | | Ampumixis | | Ampumixis dispar | | | Fall | SAFIT | DFG-ABL |
| Anabaena | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | | | | | CAD_TWG | NAU |
| Anabaena aequalis | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena aequalis | | | Borge | CAD_TWG | CSUSM |
| Anabaena californica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena californica | | | Borge | CAD_TWG | CSUSM |
| Anabaena catenula | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena catenula | | | Kutz. ex Bornet & Flahault | CAD_TWG | CSUSM |
| Anabaena cf aequalis | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf aequalis | | | Borge | CAD_TWG | CSUSM |
| Anabaena cf californica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf californica | | | Borge | CAD_TWG | CSUSM |
| Anabaena cf cylindrica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf cylindrica | | | Lemmerm. | CAD_TWG | CSUSM |
| Anabaena cf felisii | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf felisii | | | (Menegh.) Bornet et Flahault | CAD_TWG | CSUSM |
| Anabaena cf inaequalis | | Cyanobacteria | | | Cyanophyceae | | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf inaequalis | | | (Kutz.) Bornet et Flahault | CAD_TWG | CSUSM |
| Anabaena cf iyengarii | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf iyengarii | | | Bharadwaja | CAD_TWG | CSUSM |
| Anabaena cf oscillarioides | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf oscillatorioides | | | Bory ex Bornet et Flahault | CAD_TWG | CSUSM |
| Anabaena cf saaremaaensis | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf saaremaaensis | | | Skuja | CAD_TWG | CSUSM |
| Anabaena cf sphaerica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf sphaerica | | | | CAD_TWG | CSUSM |
| Anabaena cf subcylindrica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cf subcylindrica | | | Borge | CAD_TWG | CSUSM |
| Anabaena cylindrica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena cylindrica | | | Lemmerm. | CAD_TWG | CSUSM |
| Anabaena felisii | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena felisii | | | (Menegh.) Bornet et Flahault | CAD_TWG | CSUSM |
| Anabaena flosaquae | | Cyanobacteria | | | Cyanophyceae | Nostocophycidae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena flosaquae | | | Brebisson ex Bornet & Flauhault | Not Recorded | UCD-TERC |
| Anabaena inaequalis | | Cyanobacteria | | | Cyanophyceae | | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena inaequalis | | | (Kutz.) Bornet et Flahault | CAD_TWG | CSUSM |
| Anabaena oscillarioides | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena oscillatorioides | | | Bory ex Bornet et Flahault | CAD_TWG | CSUSM |
| Anabaena portoricensis | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena portoricensis | | | N. L. Gardner | CAD_TWG | CSUSM |
| Anabaena rhodopensis | | Cyanobacteria | | | Cyanophyceae | Nostocophycidae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena rhodopensis | | | I.K.Kirjakov & K.N.Velichkova | CAD_TWG | CSUSM |
| Anabaena saaremaaensis | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena saaremaaensis | | | Skuja | CAD_TWG | CSUSM |
| Anabaena sp 1 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 1 | | | | CAD_TWG | CSUSM |
| Anabaena sp 10 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 10 | | | | CAD_TWG | CSUSM |
| Anabaena sp 11 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 11 | | | | CAD_TWG | CSUSM |
| Anabaena sp 12 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 12 | | | | CAD_TWG | CSUSM |
| Anabaena sp 2 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 2 | | | | CAD_TWG | CSUSM |
| Anabaena sp 4 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 4 | | | | CAD_TWG | CSUSM |
| Anabaena sp 5 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 5 | | | | CAD_TWG | CSUSM |
| Anabaena sp 7 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 7 | | | | CAD_TWG | CSUSM |
| Anabaena sp 8 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 8 | | | | CAD_TWG | CSUSM |
| Anabaena sp 9 | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sp 9 | | | | CAD_TWG | CSUSM |
| Anabaena sphaerica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena sphaerica | | | Bornet & Flahault | CAD_TWG | CSUSM |
| Anabaena subcylindrica | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaena | | Anabaena subcylindrica | | | Borge | CAD_TWG | CSUSM |
| Anabaenopsis | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaenopsis | | | | | | CAD_TWG | CSUSM |
| Anabaenopsis cf elenkinii | | Cyanobacteria | | | Cyanophyceae | Nostocophycideae | | Nostocales | | | Nostocaceae | | | | Anabaenopsis | | Anabaenopsis cf elenkinii | | | V.V.Mill. | CAD_TWG | CSUSM |
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