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Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Infraclass: Neoptera
Order: Plecoptera
Suborder: Arctoperlaria
Family: Peltoperlidae

See text

The Peltoperlidae Claassen 1931,[1] also known as roach-like stoneflies or roachflies, are a family of stoneflies.

The family Peltoperlidae comprises six genera and 18 known species.[2] Species are semivoltine, meaning their lifecycles last 1 to 2 years. Adults of the family usually emerge in late spring or early summer, April through June. Larvae are flattened and brown in color, and they are roach-like in appearance because of the expanded thoracic plates covering the bases of their legs, heads, and abdomens.[3] Tapering gills occur on the thorax at the bases of the legs. These tracheal gills are multifunctional and key to many biological processes. No dense tufts or branching gills are found on their thoraces or abdomens.

Peltoperlidae are generally lotic erosional and depositional. These habitats are flowing streams marked by sediments, vascular plants, and detritus. Roach-like stoneflies are generally found in leaf litter and debris piles trapped in either riffles or pools.

This family is considered to be clingers-sprawlers; they attach to surface in erosional habitats or rest loosely on the top surfaces of substrates, respectively. The body of this stonefly is flattened and streamlined to aid in minimizing water resistance in a flowing stream.

The Peltoperlidae are classified as in the feeding group shredders-detritivores. They chew and mine through leaf litter in their habitats. They are a significant contributor to leaf breakdown in streams. This family is very sensitive to disturbances in environmental conditions. They are intolerant to loss of coarse particulate organic matter for food and habitat.


Genus Species Distribution
Peltoperla 2 Eastern North America
Sierraperla 1 Nevada, California
Soliperla 6 Pacific Northwest
Tallaperla 6 East
Viehoperla 1 Appalachians
Yoroperla 2 West


  1. ^ Plecoptera of North America,
  2. ^ Richard W. Merritt & Kenneth W. Cummins (1996). An Introduction to the aquatic insects of North America, 3rd ed. Kendall Hunt, Dubuque, Iowa. ISBN 0-8403-7588-3. 
  3. ^ J. R. Voshell (2002). A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward, Blacksburg, Virginia. ISBN 0-93992-387-4.