“Aquatic Caterpillars, Snout Moths”
“Alderflies, Dobsonflies, and Fishflies”
“Dragonflies and Damselflies”
“Water Scavenger Beetle Larvae”
This genus has 24 species in North America. Larvae are easily recognized by the lateral filaments on the abdomen. They tend to be found along the edges of streams and rivers.
Southeast: 8.6 and higher
Midwest: 6.7 and higher
Engulfer / Predator
Widespread (east of the Rocky Mtns.)
Lateral Gills USUALLY Absent
USUALLY 4-5-Segmented Legs
+ Expanded Character List
Order: Larvae: Usually without lateral abdominal gills. If gills present, then 4 hooks clustered on segment 10. Thoracic legs each usually with 4 or 5 segments and with 1 or 2 claws; if without legs, head distinctly sclerotized and posterior body (thorax and abdomen) simple, without gills, hair brushes, suckers, or breathing tube. Eye spots usually present, but compound eyes absent.
Family: Each mandible with 1 to 3 teeth along inner margin. Labrum and clypeus not separated by distinct suture. Antennae each 2- or 3-segmented. Head with simple-eyes in groups of 5. Legs each 3- or 4-segmented, with single claw; legs adapted for walking, sometimes small. Thoracic tergites clearly defined. Abdominal tergites without dorsal lobes. Abdomen usually 8-segmented. Body roughly cylindrical or spindle-shaped, not markedly thick. Head and legs visible in dorsal view.
Genus: only genus with lateral filaments.