Rocky Mountain capshell

Taxobox
name = Rocky mountain capshell


status = VU | status_system = IUCN2.3 [Bogan, A.E. 1996. [http://www.iucnredlist.org/search/details.php/315/all Acroloxus coloradensis] . [http://www.iucnredlist.org 2006 IUCN Red List of Threatened Species.] Downloaded on 06 August 2007.]
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
ordo = Basommatophora
familia = Acroloxidae
genus = "Acroloxus"
species = "A. coloradensis"
binomial = "Acroloxus coloradensis"
binomial_authority = J. Henderson, 1930
synonyms =

The Rocky Mountain capshell, "Acroloxus coloradensis", is a very small, freshwater limpet or snail, a species of aquatic gastropod in the family Acroloxidae.

These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch". This serves as a gill as, in their non-tidal habitat, these limpets never reach the surface for air.

Distribution and conservation status

It lives in the United States and in Canada.

Western population that lives in British Columbia and in Alberta in Canada was categorized into "not at risk" category by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) [COSEWIC. 2005. [http://www.sararegistry.gc.ca/virtual_sara/files/species/clwsa%5F0505%5Fe%2Epdf Canadian Species at Risk] . Committee on the Status of Endangered Wildlife in Canada. 64 pp., page 35.] While eastern population that lives in Ontario and in Quebec was categorized into "Data Deficient" (DD) category by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) [COSEWIC. 2005. [http://www.sararegistry.gc.ca/virtual_sara/files/species/clwsa%5F0505%5Fe%2Epdf Canadian Species at Risk] . Committee on the Status of Endangered Wildlife in Canada. 64 pp., page 38.]

References