Nerophilus

Larvae construct distinctive tubular cases using sand grains and fine particles cemented together, resembling mortar joints. Adults have the general form typical of Odontoceridae: elongated bodies, long antennae, and wings held roof-like over the body. Separation from other odontocerid genera requires examination of genitalia and wing venation patterns.

Larvae inhabit cool, flowing streams and rivers where they attach their cases to submerged rocks and woody debris. Habitats are characterized by well-oxygenated water and stable substrates. Adults are found near larval habitats, often in riparian zones with dense vegetation.

Western North America, specifically California and surrounding regions based on the species epithet and known records.

Complete metamorphosis with aquatic larval and pupal stages and terrestrial adult stage. Larvae construct portable cases that are enlarged as they grow. Pupation occurs within a modified case attached to substrate.

Larvae are sessile filter-feeders or grazers that remain attached to substrates within their cases. Case construction using silk-cemented mineral particles is the defining behavioral trait of this genus.

Larvae function as shredders or grazers in stream ecosystems, processing organic matter and algae. They serve as prey for fish and other aquatic predators. Cases provide habitat structure in benthic communities.

Used as bioindicators of water quality in stream monitoring programs due to sensitivity to habitat disturbance. No direct economic importance.

• BercaeaShares family Odontoceridae and larval case-building habit; distinguished by case materials and adult genitalia structure
• PsilotretaAnother odontocerid genus with similar larval ecology; differs in case morphology and geographic distribution

• caddisfly
• aquatic insect
• stream insect
• case-builder
• western North America
• bioindicator

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life