“Aquatic Caterpillars, Snout Moths”
“Alderflies, Dobsonflies, and Fishflies”
“Dragonflies and Damselflies”
“Net-spinning Caddisflies, Common Netspinners, Seine-net Weavers”
5 species in North America. This genus is known for its ventral apotome being in two parts with the posterior portion at least half as long as ecdysial line. They live in small, cool streams. Length of larvae is up to 15mm.
Collector / Filterer
Widespread (east of the Rocky Mtns.)
Prolegs With Single Hook
All Nota Sclerotized
Setal Fan On Prolegs
Ventral Branched Abdominal Gills
+ Expanded Character List
Order: Larvae: Wings/wing pads absent. Eye spots present, but compound eyes absent. Antennae usually small, inconspicuous. Three pairs of segmented legs present on thorax. Pair of anal prolegs, each with single hook, located on last abdominal segment. Larvae can be free-living, in silken retreats attached to substrate, or in usually-portable tubes or cases made of sand, rocks, or plant material.
Family: Pro-, meso-, and metanota entirely covered by sclerites. Ventral side of abdomen with rows of branched gills. Conspicuous tuft or fan of long hairs on each anal proleg. Anal claw with stout apical hook. Larvae building stationary retreats of silk, detritus, and rock fragments and add a silken net for filter feeding.
Genus: Besides the ventral apotome characters, the small "U" shape marking on the head can help identify the genus, also the lack of a transverse sulcus on the pronotum