Shell large, disc-shaped; greenish-yellow, olive-greenish or brown; growth lines and microscopic spiral striae but sculpture not beaded; apertural lip slightly straightened but not conspicuously ?drooping?.
Snails belonging to the family Haplotrematidae are omnivores. Prey includes earthworms, slugs and snails.
This species is common in forests, where it lives under rocks, logs and moss, or deep in forest litter. It is also observed in purely coniferous forests where other large snails are infrequent or absent (Forsyth 2004). Along the BC coast, this species occurs at generally lower elevations (below about 460 m).
W North America
Genus from the Greek "haplos" (simple) and "trema" (aperture or hole); the gender is neuter. The species was named for Fort Vancouver, now Vancouver, Washington, where presumably it was first collected.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2021. 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:
2022-09-30 5:55:50 PM]
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