<<

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 Brachycentridae Hydropsychdae vegetation, sand, or small stones Glossosoma Hydropsyche

Hydroptilidae Lepidostomatidae Mayatrichia Palaegapetus Lepidostoma

Leptoceridae Odontoceridae Mystacides Chimmarra

Polycentropodidae Ryhacophilidae Uenoidae Cyrnellus Ryhacophila

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

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

Caenidae Ephemerellidae Caenis Caudatella Drunella

Ephemerellidae Timpanoga Hexagenia limbata Epeorus (2 tails)

Heptageniidae Leptophelbiidae Leptophelbiidae Stenonema Paraleptophlebia Paraleptophlebia debilis

Leptohyphidae Asioplax Siphlonurus

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

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

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

Diptera (Flies) Larvae characteristics: Usually elongate Maggot like Never posses segmented legs Ceratopogonidae (net winged midges) (no-see-ums) Bezzia

Chironomidae Nostococladius Chironomidae Pupae (midges) buried in Nostoc algae

Culicidae Culicidae (mosquitoes) Culiseta pupae & adult Meringodixa

Empididae Nymphomyiidae Oreogeton (rat-tail maggot) Nymphomyia

Simuliidae Simuliidae pupae Tipulidae (craneflies) (blackflies) Hesperoconopa

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

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 Hesperocorixa (Giant waterbugs, toe biter) (water boatmen) (water striders) legs present

Hydrometridae (backswimmers) (creeping waterbugs) Nonecta kirbyi

Megaloptera (Dobsonflies, alderfiles, and fishflies Larvae characteristics: lateral filaments Coryadalidae larvae Corydalus cognatus larvae and adult

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)

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

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

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

Commonly encountered non-

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)

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

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

Others

Coelenterata Hydridae Collembola ()

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