Order: Trichoptera

Caddisflies

The key for Trichoptera can be found in Chapter 10 of the Guide to Aquatic Invertebrates of the Upper Midwest, pages 119-135. Once you have keyed out your insect, you can use the photographs on this website to verify your identification.

Larval Trichoptera resemble caterpillars except Trichoptera lack abdominal prolegs with crochets. Tricoptera can be identified by their short antennae, sclerotized head, sclerotized plates on thoracic segments, soft abdomen, three pairs of segmented legs, and an abdomen that terminates in a long pair of prolegs bearing hooks.

In many taxa, the shape and construction materials of a retreat or case can also be diagnostic. However, in macroinvertebrate samples, the case is sometimes lost and morphological characters must be relied upon.

Trichoptera adult lateral view of a Trichopteran larva

Trichoptera

BrachycentridaeBrachycentridae
Humpless Caddisflies


GlossosomatidaeGlossosomatidae
Saddle Case Caddisflies
 

HelicopsychidaeHelicopsychidae
Snail Case Caddisflies


HydropsychidaeHydropsychidae
Net-Spinner Caddisflies


HydrophilidaeHydroptilidae
Micro Caddisflies


LeptoceridaeLeptoceridae
Long-horned Caddisflies


LimnephilidaeLimnephilidae
Northern Caddisflies


MolannidaeMolannidae
Hood Case Caddisflies


PhilopotamidaePhilopotamidae
Finger Net Caddisflies


PhryganeidaePhryganeidae
Giant Caddisflies



PolycentropodidaePolycentropodidae
Tube/Trumpet Caddisflies


RhyacophilidaeRhyacophilidae
Free-living Caddisflies


UenoidaeUenoidae
Uenoid Caddisflies