Rare Species Guide

  Basis for Former Listing

Two female caddisflies identified as Dappled Long-horned Caddisflies (Setodes guttatus) were reported from Cass County in 1965 (Etnier 1965). This collection is the only known occurrence of this species in Minnesota.  The Dappled Long-horned Caddisfly was listed as a special concern species in 1996.

  Basis for Delisting

Upon examination, comparison with other specimens, and using Holzenthal (1982) and Holzenthal and Harris (1985) as guides, specimens of this species have been re-identified as Little Long-horned Caddisflies (S. oligius; Ross). The latter species is known in Minnesota from scattered localities in the central and northcentral portions of the state (Houghton et al. 2001). The Dappled Long-horned Caddisfly is known only from New England, Quebec, and Alabama and it is unlikely to occur in Minnesota. The species was delisted in 2013.

  References and Additional Information

Etnier, D. A. 1965. An annotated list of the Trichoptera of Minnesota, with a description of a new species. Entomological News. Vol 76, No. 6, pp. 141-152.

Minnesota Department of Natural Resources. 2012. Statement of need and reasonableness. Division of Ecological and Water Resources, Minnesota Department of Natural Resources, St. Paul. 337 pp.