The Perlesta placida (Hagen) complex (Plecoptera: Perlidae) in Illinois, new state records, distributions, and an identification key

R. E. Dewalt, D. W. Webb, T. N. Kompare

Research output: Contribution to journalArticlepeer-review

Abstract

Perlesta placida (Hagen), a complex of perlid stoneflies in eastern and central North America, currently includes 17 described species. Large collections of this genus exist at the Illinois Natural History Survey, and, as part of an effort to update the status of stoneflies in Illinois, all adult Illinois specimens were reexamined. Perlesta decipiens (Walsh) and P. golconda DeWalt and Stark were previously recorded from Illinois, and, with the addition of six new state records, the total number of Perlesta known from Illinois is now eight. The latter include P. cinctipes (Banks), P. nr. teaysia Kirchner and Kondratieff, P. lagoi Stark, P. nelsoni Stark, P. shubuta Stark, and P. xube Stark and Rhodes. For all species but P. cinctipes, ranges are greatly increased from either the southeastern states or the north-central Plains region. Other midwestern states are likely to harbor a speciose assemblage of Perlesta. Distributions and associated ecological conditions suggested a wider range of pollution tolerance than is currently known from published literature. A key to males, females, and eggs is provided to aid with regional identification of Perlesta.

Original languageEnglish (US)
Pages (from-to)207-216
Number of pages10
JournalProceedings of the Entomological Society of Washington
Volume103
Issue number1
StatePublished - Jan 1 2001

Keywords

  • Distribution
  • Illinois
  • Key
  • Perlesta placida complex
  • Plecoptera

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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