Sericostomatidae

Definition

A family of caddisflies (order Trichoptera) characterized by larvae that construct portable, sand-grain cases and adults with reduced mouthparts. The family comprises approximately 19 genera and 90+ described species, distributed primarily in the Holarctic region with some southern extensions. Larvae are typically detritivores or grazers in cool, flowing waters.

Etymology

From Greek serikos (silken) + stoma (mouth) + -idae (family suffix), referring to the silk-producing mouthparts used in larval case construction.

Example

Larvae of Sericostoma personatum, a widespread European species, build distinctive curved cases from sand grains and plant fragments, cemented with silk secreted from modified labial glands.

Related Terms

• Trichoptera
• Integripalpia
• caddisfly
• case-building
• larval case
• silk gland
• aquatic insect

Usage Notes

Sometimes referred to as 'sand-cased caddisflies' or 'bushtailed caddisflies' in older literature. Distinguished from related families (e.g., Phryganeidae, Limnephilidae) by case morphology and adult genitalic characters. Not to be confused with the similarly named but unrelated lepidopteran family Sericostoma (a junior homonym resolved in favor of the trichopteran usage).