The BugLab, Utah State University© May 2001 www.usu.edu/buglab

A Pictorial Guide to the Orders of Aquatic Invertebrates National Aquatic Monitoring Center, a.k.a. The BugLab Department of Fisheries and Wildlife Utah State University, Logan, Utah 84322-5210 www.usu.edu/buglab

Trichoptera (Caddisflies) Larvae characteristics: Fleshy abdomen 2 claws on last abdominal segment sometimes hiding in a case made of vegetation, sand, or small stones

Brachycentridae Glossosomatidae Hydropsychdae Brachycentrus Glossosoma Hydropsyche

Hydroptilidae Hydroptilidae Lepidostomatidae Mayatrichia Palaegapetus Lepidostoma

Leptoceridae Odontoceridae Philopotamidae Mystacides Marilia Chimmarra

Polycentropodidae Ryhacophilidae Uenoidae Cyrnellus Ryhacophila Neophylax

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Ephemeroptera (Mayflies) Larvae characteristics: Two thoracic segments gills on abdomen usually three tails and one claw

Baetidae Baetidae Baetiscidae Baetis Baetis Baetisca

Caenidae Ephemerellidae Ephemerellidae Caenis Caudatella Drunella

Ephemerellidae Ephemeridae Heptageniidae Timpanoga Hexagenia limbata Epeorus (2 tails)

Heptageniidae Leptophelbiidae Leptophelbiidae Stenonema Paraleptophlebia Paraleptophlebia debilis

Leptohyphidae Leptohyphidae Siphlonuridae Asioplax Tricorythodes Siphlonurus

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Plecoptera (Stoneflies) Larvae characteristics: three thoracic segments gills if any on neck and thorax all have two tails (cerci) all have two claws

Chloroperlidae Nemouridae Nemouridae Sweltsa Amphinemura Malenka

Perlidae Perlodidae Perlodidae Calineuria Isogenoides Perlinodes

Peltoperlidae Pteronarcyidae Soliperia Pteronarcys californica

Taeniopterygidae Taenyopteryx Taeniopterygidae Oemopteryx (both)

Odonata (Dragonflies and damselflies) Larvae characteristics: Hinged mouthparts Damselflies

Coenagrionidae Argia

Dragonflies Gomphidae Lanthus Libellulidae Libellulidae Libellula pulchella

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Diptera (Flies) Larvae characteristics: Usually elongate Maggot like Never posses segmented legs

Blephariceridae Ceratopogonidae Ceratopogonidae (net winged midges) (no-see-ums) Bezzia

Chironomidae Chironomidae Nostococladius Chironomidae Pupae (midges) buried in Nostoc algae

Culicidae Culicidae Dixidae (mosquitoes) Culiseta pupae & adult Meringodixa

Empididae Ephydridae Nymphomyiidae Oreogeton (rat-tail maggot) Nymphomyia

Simuliidae Simuliidae pupae Tipulidae (craneflies) (blackflies) Hesperoconopa

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Family Chironomidae (midges) Larvae characteristics: front and back prolegs small skinny body complete head capsule

Chironominae: two separate eyes

Orthocladiinae: weeping eyes and dark head

Tanypodinae: single eye that is round or ‘Pac-man’ shaped, light mouthparts

The BugLab, Utah State University© May 2001 www.usu.edu/buglab

Hemiptera (True bugs) Adults most often encountered Characteristics: mouthparts united in a jonted beak mandibles concealed wings or wing pads present legs present

Belostomatidae Corixidae Hesperocorixa Gerridae (Giant waterbugs, toe biter) (water boatmen) (water striders)

Hydrometridae Naucoridae Notonectidae (backswimmers) Hydrometra (creeping waterbugs) Ambrysus Nonecta kirbyi

Coryadalidae larvae Corydalus cognatus larvae and adult

Megaloptera (Dobsonflies, alderfiles, and fishflies Larvae characteristics: lateral filaments

Sialidae Sialis Sialis

Lepidoptera (moths) - Larvae characteristics: Segmented legs and prolegs at least two pair of ventral fleshy leg-like protuberances tipped with tiny hooks

Pyralidae Petrophila (dorsal and ventral)

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Coleoptera (Beetles) Characteristics: No anal claws fleshy abdomen mandibles present legs suitable for walking adults also aquatic

Amphizoidae Dytiscidae Dytiscidae (trout stream beetles) (Predaceous diving beetles) Amphizoa Agabus Coptotomus

Dytiscidae Dytiscidae Dytiscidae (Predaceous diving beetles) Hydaticus Oreodytes Rhantus

Dytiscidae Elmidae Elmidae (Predaceous diving beetles) (Riffle beetles) Themonectus marmoratus Optioservus Microylloepus

Gyrinidae Haliplidae Hydrophilidae (whirligig beetles) (crawling water beetles) (water scavenger beetles) Gyrinus Peltodytes Ametor

Hydrophilidae Hydrophilidae Psephenidae Berosus Paracymus (water pennies) Eubrianax

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Commonly encountered non-insects

Mollusca

Pelecypoda (clams and mussels)

Corbiculidae Corbicula Margaritifera. Spahaeriidae Pisidium

Mollusca Gastropoda

(snails)

Ancylidae (limpets) Lymnaeidae Ferrissia Planorbidae

Pleuroceridae Juga Physidae Physella

Large to medium sized Crustaceans

Decapoda Anostraca Notostraca (tadpole shrimp) (crayfish) (fairy shrimp) Triops longicaudatus

Small sized Crustaceans

Amphipoda (scuds) Amphipoda Crangonyctidae Isopoda (sow bugs) Gammarus (top), Hyallela (bottom) Stygobromus Asellidae

Tiny sized Crustaceans Zooplankton

Cladocera (water fleas) Copepoda Ostracoda (clam shrimp)

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Annelids Worms, leeches

Hirundinea Nematoda Oligochaeta Lumbruculidae (leeches) (round worms) (segmented worms)

Others

Coelenterata Hydridae Collembola (springtails)