Submerged-wood
Guides
Cyrnellus
Cyrnellus is a genus of caddisflies in the family Polycentropodidae. Larvae of at least one species, C. fraternus, are specialized inhabitants of submerged wood (snags) in river systems, where they construct retreats. The genus was established by Nathan Banks in 1913. Species within this genus appear to exhibit specific microhabitat preferences related to flow conditions and substrate stability.