Pteronarcidae

Definition

A family of large, robust stoneflies (order Plecoptera) commonly called salmonflies or giant stoneflies. Adults are recognized by their size (often 30–50 mm), dark coloration with orange or yellow markings, and well-developed mouthparts. Larvae are aquatic, flattened, and gill-bearing, typically inhabiting cool, well-oxygenated streams where they are shredders of leaf litter and important prey for fish.

Etymology

From Greek pteron (wing) + narkē (numbness, torpor), referring to the sluggish movements characteristic of stoneflies.

Example

Pteronarcys californica, the salmonfly, is a widely distributed western North American species whose mass emergence provides a critical food pulse for trout and other stream predators.

Synonyms

• Pteronarcyidae

Related Terms

• Plecoptera
• Pteronarcys
• stonefly
• aquatic insect
• shredder
• benthic macroinvertebrate

Usage Notes

The spelling Pteronarcyidae (with -cy-) appears in older literature but is now treated as an unjustified emendation; Pteronarcidae is the valid spelling per ICZN. The family is distinguished from other Plecoptera families by larval gill structure and adult wing venation. Adults are short-lived and non-feeding; larvae may live 2–4 years.