This genus is important for trout anglers. Many species of Lepidostoma produce excellent hatches, especially in the West. Lepidostoma can be very prolific in spring creek environments or smaller runoff streams with springs. Lepidostoma togatum is the most important species of this genus in the East and Midwest. The West has several species that are important. Where & WhenThis genus is widely distributed with important species nationwide in all types of water. Some are especially prolific in small streams, and Gary LaFontaine had interesting comments on that in Caddisflies:
» Genus Lepidostoma (Little Brown Sedges)
48 species aren't included.
I know many fly fishermen, some in the East and some in the Midwest, who have fallen in love with a certain type of trout stream. The big brawling rivers are not for them; no, they stalk the overgrown tributaries of these heavily fished waters instead. ... For these fly-fishing cronies I once had a picture postcard custom made showing an adult of Lepidostoma.Hatching Behavior
Time Of Day (?):The pupae swim up to the surface in slow to medium water and presumably emerge there on the surface. They ride the water for a long time before taking flight. Trout may feed heavily on the drifting pupae, emerging adults, or the emerged wing-drying adults.Egg-Laying BehaviorLepidostoma adults lay their eggs on or near the surface, but I haven't found the specifics and they probably vary by species.Larva & Pupa Biology
Diet: Leaves or pine needlesLepidostoma larvae are especially likely to undergo behavioral drift (Behavioral drift: The nymphs and larvae of many aquatic insects sometimes release their grip on the bottom and drift downstream for a while with synchronized timing. This phenomenon increases their vulnerability to trout just like emergence, but it is invisible to the angler above the surface. In many species it occurs daily, most often just after dusk or just before dawn.) in June.Lepidostoma Fly Fishing TipsIn spite of the common names for this genus, the two most important species (Lepidostoma togatum and Lepidostoma pluviale) have green bodies.
Shelter Type: Four-sided case of bark or leaf pieces, sand case in a round tube shape, or case of tiny twigs "log cabin" style
Pictures of 6 Little Brown Sedge Specimens:
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