This family of snails is characterized by shells exhibiting sinistral or left-handed coiling They are typically elliptical to ovate in shape with a large ovate aperture and a short spire (Perez et al. 2004). They display a lot of ecophenotypic variation and are difficult to identify (Perez et al. 2004).
Like other physids, this species is ectothermic and cannot regulate its body temperature, and as such, prefers habitat with favourable tempratures for reproduction. As with other members of this snail family, this is an egg-laying hermaphroditic species that lays eggs in the spring; eggs hatch directly as substrate-dependent juveniles.
“Known localities are all large or medium sized oligotrophic lakes (Taylor, 2003)” (BCCDC 2010).
In North America, this species is reported from British Columbia and Washington (Taylor 2003).
Distribution in British Columbia
In British Columbia, this species is reported from Kootenay, New Westminster, Yale districts, and Lake Osoyoos (Taylor 2003).
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2019. E-Fauna BC:
Electronic Atlas of the Fauna of British Columbia [efauna.bc.ca]. Lab
for Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2020-08-03 11:14:19 AM]
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