Fingernet Caddisflies

Pronunciation

How to pronounce Philopotamidae: /fɪloʊˈpɒtəˌmaɪdiː/

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Summary

Philopotamidae, commonly known as finger-net caddisflies, are notable for their larvae that construct elaborate silk nets in aquatic environments. They exhibit a range of species characterized by distinct morphological traits and lifestyles in flowing waters.

Physical Characteristics

Adult body size ranging from 5-9 mm; wing span between 12-20 mm; many adults are uniformly dark brown to black; distinct labrum that is membranous and T-shaped in larvae; the 5th segment of maxillary palp 2-3 times longer than the 4th.

Identification Tips

Identification of adults involves examining color, wing structure, and palp length, while distinguishing larvae can be done by their net-spinning behavior and body shape.

Habitat

Larvae inhabit fast-flowing portions of rivers and streams.

Distribution

Found throughout North America and much of the world; species diversity includes about 51 species in 4 genera locally and approximately 1170 species in around 20 genera globally.

Diet

Larvae are filter feeders, consuming small food particles trapped in their silk nets.

Life Cycle

Both sexes of Dolophilodes distinctus are active year-round, while other species may be active from spring through fall.

Ecosystem Role

Plays a significant role in aquatic ecosystems as a filter feeder, contributing to nutrient cycling and serving as prey for various aquatic organisms.

Similar Taxa

• Caddisflies (order Trichoptera)

Tags

• Caddisflies
• Philopotamidae
• Insects