| Taxon |
Description |
| Abiskomyia |
A
genus within the Midges family of (aquatic) True Flies |
| Ablabesmyia |
A
genus within the Midges family of (aquatic) True Flies |
| Acamptocladius |
A
genus within the Midges family of (aquatic) True Flies |
| Acanthagrion |
A
genus within the Narrowwinged family of Damselflies |
| Acentrella |
A
genus within the Small minnow family of Mayflies |
| Acerpenna |
A
genus within the Small minnow family of Mayflies |
| Acilius |
A
genus within the Predaceous Diving Beetle family of (aquatic) Beetles |
| Acneus |
A
genus within the Water Penny Beetle family of (aquatic) Beetles |
| Acricotopus |
A
genus within the Midges family of (aquatic) True Flies |
| Acroneuria |
A
genus within the Common family of Stoneflies |
| Actopelopia |
A
genus within the Midges family of (aquatic) True Flies |
| Aeshna |
A
genus within the Darner family of Dragonflies |
| Aeshnidae |
The
Darner family of Dragonflies |
| Agabinus |
A
genus within the Predaceous Diving Beetle family of (aquatic) Beetles |
| Agabus |
A
genus within the Predaceous Diving Beetle family of (aquatic) Beetles |
| Agapetus |
A
genus within the Saddle case maker family of Caddisflies |
| Agathon |
A
genus within the Netwinged Midges family of (aquatic) True Flies |
| Agnetina |
A
genus within the Common family of Stoneflies |
| Agraylea |
A
genus within the Purse case maker family of Caddisflies |
| Agrypnia |
A
genus within the Giant case maker family of Caddisflies |
| Alisotrichia |
A
genus within the Purse case maker family of Caddisflies |
| Allocosmoecus |
A
genus within the Northern case maker family of Caddisflies |
| Allomyia |
A
genus within the Apataniid case maker family of Caddisflies |
| Alloperla |
A
genus within the Green family of Stoneflies |
| Alluaudomyia |
A
genus within the Biting Midges (no-see-ums) family of (aquatic) True Flies |
| Alotanypus |
A
genus within the Midges family of (aquatic) True Flies |
| Ambrysus |
A
genus within the Creeping Water Bug family of Waterbugs |
| Ameletidae |
The
Primitive minnow family of Mayflies |
| Ameletus |
A
genus within the Primitive minnow family of Mayflies |
| Ametor |
A
genus within the Water Scavenger Beetle family of (aquatic) Beetles |
| Ametropodidae |
The
Sand minnow family of Mayflies |
| Ametropus |
A
genus within the Sand minnow family of Mayflies |
| Amiocentrus |
A
genus within the Humpless case maker family of Caddisflies |
| Amphiagrion |
A
genus within the Narrowwinged family of Damselflies |
| Amphicosmoecus |
A
genus within the Northern case maker family of Caddisflies |
| Amphinemura |
A
genus within the Spring Stoneflies family of Stoneflies |
| Amphizoa |
A
genus within the Troutstream Beetle family of (aquatic) Beetles |
| Amphizoidae |
The
Troutstream Beetle family of (aquatic) Beetles |
| Ampumixis |
A
genus within the Riffle Beetle family of (aquatic) Beetles |
| Anabolia |
A
genus within the Northern case maker family of Caddisflies |
| Anacroneuria |
A
genus within the Common family of Stoneflies |
| Anagapetus |
A
genus within the Saddle case maker family of Caddisflies |
| Anamalagrion |
A
genus within the Narrowwinged family of Damselflies |
| Anax |
A
genus within the Darner family of Dragonflies |
| Anchycteis |
A
genus within the Toed-Winged Beetle family of (aquatic) Beetles |
| Anchytarsus |
A
genus within the Toed-Winged Beetle family of (aquatic) Beetles |
| Anisoptera |
The
Dragonflies suborder of Dragonflies, Damselflies |
| Annulipalpia |
The
Fixed-retreats & capture nets suborder of Caddisflies |
| Anthomyiidae |
The
Anthomyzid Flies family of (aquatic) True Flies |
| Anthopotamus |
A
genus within the Hacklegill family of Mayflies |
| Antocha |
A
genus within the Crane Flies family of (aquatic) True Flies |
| Apanisagrion |
A
genus within the Narrowwinged family of Damselflies |
| Apatania |
A
genus within the Apataniid case maker family of Caddisflies |
| Apataniidae |
The
Apataniid case maker family of Caddisflies |
| Apedilum |
A
genus within the Midges family of (aquatic) True Flies |
| Aphylla |
A
genus within the Clubtail family of Dragonflies |
| Apobaetis |
A
genus within the Small minnow family of Mayflies |
| Apsetrotanypus |
A
genus within the Midges family of (aquatic) True Flies |
| Apteraliplus |
A
genus within the Crawling Water Beetle family of (aquatic) Beetles |
| Archilestes |
A
genus within the Spreadwinged family of Damselflies |
| Arctoconopa |
A
genus within the Crane Flies family of (aquatic) True Flies |
| Arctopora |
A
genus within the Northern case maker family of Caddisflies |
| Arctopsyche |
A
genus within the Common net-spinner family of Caddisflies |
| Arcynopteryx |
A
genus within the Perlodid family of Stoneflies |
| Argia |
A
genus within the Narrowwinged family of Damselflies |
| Argiallagma |
A
genus within the Narrowwinged family of Damselflies |
| Asioplax |
A
genus within the Little stout crawler family of Mayflies |
| Asynarchus |
A
genus within the Northern case maker family of Caddisflies |
| Athericidae |
The
Watersnipe Flies family of (aquatic) True Flies |
| Atherix |
A
genus within the Watersnipe Flies family of (aquatic) True Flies |
| Atractelmis |
A
genus within the Riffle Beetle family of (aquatic) Beetles |
| Attaneuria |
A
genus within the Common family of Stoneflies |
| Attenella |
A
genus within the Spiny crawler family of Mayflies |