The Stoneflies (465 NA spp, 618 on the Internet) are most at home in cold, well-aerated, fast-flowing streams with rocky substrate. Montane regions of the west and the Appalachian Region are richest in species. Naiads have two caudal filaments and external gills. Most families are detritivores (scraping the substrate for algal deposits, chewing leaves, etc), but a few families are predaceous. Of the nine NA families of Stoneflies, only the Peltoperlidae has no Minnesota representatives. Roughly 60 species are reported for the state (51 spp in Harden and Mickel, 1952). Only one species (Isoperla sp) has been collected at Cedar Creek, and few others are likely to occur here. All families known to occur in Minnesota are mentioned below. A few undetermined species representing xx families collected in outstate MN are imaged.
Harden PH and CE Mickel (1952). The Stoneflies of Minnesota (Plecoptera). Univ. of Minn Ag Expt Station Tech Bull No. 201 (84 pp).
|1.||Family NEMOURIDAE||Spring Stoneflies||(58 NA spp)|
|2.||Family TAENIOPTERYGIDAE||Winter Stoneflies||(25 NA spp)|
|3.||Family CAPNIIDAE||Small Winter Stoneflies||(129 NA spp)|
|4.||Family LEUCTRIDAE||Rolled-wing Stoneflies||(45 NA spp)|
|5.||Family PTERONARCYIDAE||Giant Stoneflies||(10 NA spp)|
|6.||Family PELTOPERLIDAE||Roachlike Stoneflies||(13 NA spp)|
|7.||Family PERLODIDAE||Perlodid Stoneflies||(98 NA spp)|
|8.||Family CHLOROPERLIDAE||Green Stoneflies||(57 NA spp)|
|9.||Family PERLIDAE||Common Stoneflies||(30 NA spp)|
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