Roach-like Stoneflies

Peltoperlidae

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Plecoptera
Superfamily: Pteronarcyoidea
Family: Peltoperlidae

Pronunciation

How to pronounce Peltoperlidae: //ˌpɛl.toʊˈpɜr.lɪˌdi//

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Summary

The Peltoperlidae family, known as roach-like stoneflies, includes 11 genera and 46 species in North America and about 70 species globally. Characterized by flattened, brown larvae with unique gill structures and a semivoltine life cycle, they inhabit flowing streams and play an important ecological role as shredders and detritivores.

Physical Characteristics

Flattened and brown larvae with expanded thoracic plates; tapering tracheal gills occur at the bases of legs; adults have two ocelli and two compound eyes; males have sclerotized rod-like epiprocts; no cross-veins in anal lobe of forewings.

Identification Tips

Larvae are distinguished by flattened bodies and broad, chisel-like mandibles; adults can be identified by their ocelli and wing structure.

Habitat

Lotic erosional and depositional habitats, primarily flowing streams with sediments, vascular plants, and detritus; found in leaf litter and debris in riffles or pools.

Distribution

North America, Eastern Asia, and Southern Asia; approximately 46 species in the area and worldwide about 70 species in 10 genera.

Diet

Feeding group shredders-detritivores; they chew and mine leaf litter and contribute significantly to leaf breakdown in streams.

Life Cycle

Semivoltine; lifecycles last one to two years; adults emerge in late spring or early summer (April through June).

Ecosystem Role

Significant contributors to leaf breakdown; sensitive to environmental disturbances, making them potential bioindicators.