Larvae are usually found in lotic-erosional habitats with coarse sediments, debris accumulations, leaf packs, and in quieter water at the edges of streams, and also are frequently found in large rivers. Larvae can be difficult to spot as they are often slow-moving and covered in debris. Similar to other shredders, these larvae have paraglossae and glossae about the same length. These larvae can be easily confused with Nemouridae as they both have wing pads divergent (not parallel with the body axis) but can be distinguished because the second tarsal segment of each leg of Taeniopterygidae is about the same length as the first.
Wings developing in wing pads. Mouthparts suitable for chewing. Gills digitiform and located near mouthparts, on neck, sides of thorax, or underside of base of abdomen, never on top or sides of abdomen. Two tarsal claws per leg. Only two tails (cerci).
Family:Paraglossae and glossae about same length. Second tarsal segment of each leg about same length as first. Wing pads divergent, not parallel with body. Gills absent on abdominal segments. Unlike Peltoperlidae, gills, if present, not conical, and thoracic sterna not overlapping. Unlike Nemouridae, hind legs not reaching end of the abdomen.
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