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Family Philopotamidae - Fingernet Caddisflies

Caddisfly - Chimarra obscura Fingernet - Dolophilodes distinctus Black Caddis - Chimarra caddisfly larva - Chimarra Chimarra sp.? - Chimarra Philopotamid caddisfly? - Chimarra Dolophilodes distinctus - male Caddisfly - Chimarra
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Trichoptera (Caddisflies)
Suborder Annulipalpia
Superfamily Philopotamoidea
Family Philopotamidae (Fingernet Caddisflies)
Explanation of Names
Philopotamidae Stephens 1829
Philopotamus = 'loving rivers'
FINGERNET: larvae construct groups of silken nets shaped like fingers
Numbers
51 spp. in 4 genera (2 subfam.) in our area(1), ~1170 spp. in ~20 genera (3 subfam.) total(2)
Size
wing span 12–20 mm(3); adult body 5-9 mm
Identification
Adult: many are uniformly dark brown to black; 5th segment of maxillary palp 2-3 times as long as the 4th; females of the eastern Dolophilodes distinctus are wingless
Larva: metanotum membranous; labrum membranous, T-shaped(4)
key to MI spp.(5)
Range
throughout North America and much of the world(1)(3)
Habitat
larvae in fast-flowing portions of rivers and streams
Season
in Dolophilodes distinctus, both sexes active year-round; others from spring through fall
Food
larvae are filter-feeders, eating small particles trapped in their nets
Remarks
Larvae spin very fine-meshed nets, usually grouped together on the undersides of rocks near the upstream edge. The nets collapse when the rocks they are attached to are removed from the water.