Lepidurus couesii, Coues Tadpole Shrimp, is found within Canada from British Columbia (Royal BC Museum Collections) east to Manitoba, and within the USA across the northern
tier of states from Idaho to Minnesota, plus Oregon and Utah (Rogers, 2001). Within British Columbia it has been collected from the vicinities of 70 Mile House and Rolla.
This species is found in vernal pools and temporary wetlands, though Hossack et al (2010) reported it from permanent beaver ponds. Clifford (1991) noted that though Lepidurus is considered part of the vernal fauna, it has been collected in Alberta as late as early October.
References
Clifford, H.F. 1991. Aquatic Invertebrates of Alberta. University of Alberta Press, Edmonton. 538pp.
Hossack, B.R., R.L. Newell & D.C. Rogers 2010. Branchiopods (Anostraca, Notostraca) from Protected Areas of Western Montana. Northwest Science 84: 52-59.
Rogers, D.C. 2001. Revision of the Nearctic Lepidurus (Notostraca). Journal of Crustacean Biology 21(4): 991-1006.
Royal BC Museum Collections. Available Online: http://search-
collections.royalbcmuseum.bc.ca/Invertebratezoology (Accessed 21 Jun 2016)
Note Author: Ian Gardiner
