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Family Philopotamidae - Fingernet Caddisflies

Fingernet - Dolophilodes distinctus Fingernet - Dolophilodes distinctus Philopotamadie, genus Wormaldia - Wormaldia Chimarra Chimarra sp. - voucher specimen, in alcohol - Chimarra Chimarra? - Chimarra Mystery bug - Chimarra Philopotamidae? - Wormaldia
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
51 spp. in 4 genera (2 subfam.) in our area(1), ~1170 spp. in ~20 genera (3 subfam.) total(2)
wing span 12–20 mm(3); adult body 5-9 mm
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)
throughout North America and much of the world(1)(3)
larvae in fast-flowing portions of rivers and streams
in Dolophilodes distinctus, both sexes active year-round; others from spring through fall
larvae are filter-feeders, eating small particles trapped in their nets
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.