Annotated Species List

In June 2001 a total of 53 localities or stations were surveyed, in addition to other localities outside the upper Fraser Basin Living Landscapes region and beyond the scope of this report. They form the majority of the 83 unique localities listed in the Appendix (see also Figure 2).

Thirteen families¹, 16 genera and 27 species (exclusive of the Succineidae) are documented here from the
upper Fraser Basin. Only two species—Discus shimekii and O. nuttallianum—have been recorded in the malacological literature from this region (Stanwell-Fletcher & Stanwell-Fletcher 1943; Harris & Hubricht 1982). The Living Landscapes survey in 2001 added 12 species not previously recorded from the area. The remaining 15 species were already known from the upper Fraser Basin but unpublished (Table 1).

The majority of species in upper Fraser Basin are native, but at least six species — Vallonia excentrica, Vallonia pulchella, Arion circumscriptus, Arion subfuscus, Limax maximus and Deroceras reticulatum — are introduced. Cochlicopa lubrica, is a special case since it shows a strong synanthropic tendency and may be at least partially introduced in British Columbia.

¹ The families used here are as presented in Land Snails of British Columbia (Forsyth 2004); many North American authors (for example, Turgeon et al.1998) recognize fewer families.

Terrestrial Gastropods ...   
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