Ceraclea brevis (Etnier, 1968)
Basis for Former Listing
Ceraclea brevis is known worldwide only from the male holotype collected in 1965 in Crow Wing County, Minnesota. It has not been relocated despite collecting at a variety of lake and stream habitats near this locality (Luedeman 1991; Houghton et al. 2001). Further inventory work is needed to relocate C. brevis and delineate its range in the state. Given its extremely limited distribution and uncertainty surrounding its status, C. brevis was listed as a special concern species in Minnesota in 1996.
Basis for Delisting
Scientistists have been unable to rediscover C. brevis despite extensive collecting. Recent examination of the C. brevis specimen suggests that it may actually be that of a similar and much more common species C. tarsipunctata. Until it can be confirmed that this is a distinct species and is still present in Minnesota, a status of special concern is not necessary. Ceraclea brevis was delisted in 2013.
References and Additional Information
Hilsenhoff, W. L. 1987. An improved biotic index of organic stream pollution. Great Lakes Entomologist 20:31-39.
Houghton, D. C., and R. W. Holzenthal. 2003. Updated conservation status of protected Minnesota caddisflies. The Great Lakes Entomologist 36(1-2):35-40.
Houghton, D. C., R. W. Holzenthal, M. P. Monson, and D. B. MacLean. 2001. Updated checklist of the Minnesota caddisflies (Trichoptera) with geographic affinities. Transactions of the American Entomological Society 127(4):495-512.
Ludeman, J. 1991. A preliminary survey for endemic species, and restricted or disjunct populations of caddisflies in Minnesota. Report submitted to the Minnesota Department of Natural Resources. 7 pp.
Minnesota Department of Natural Resources. 2012. Statement of need and reasonableness. Minnesota Department of Natural Resources. Division of Ecological and Water Resources. St. Paul, Minnesota. 337 pp.
Monson, M. P. 1994. The caddisflies (Insecta: Trichoptera) of the Lake Itasca region, Minnesota, and a preliminary assessment of the conservation status of Minnesota Trichoptera. Thesis, University of Minnesota, Saint Paul, Minnesota. 135 pp.
Morse, J. C. 1975. A phylogeny and revision of the caddisfly genus Ceraclea (Trichoptera: Leptocerdae). Contributions of the American Entomological Institute 11:1-97.
Resh, V. H., and J. D. Unzicker. 1975. Water quality biomonitoring and aquatic organisms: the importance of species identification. Journal of the Water Pollution Control Federation 47:9-19.
Wiggins, G. B. 1996. Larvae of the North American caddisfly genera (Trichoptera), Second edition. University of Toronto Press, Ontario, Canada. 457 pp.