Distribution of the species of the genus Oxyloma (Mollusca, Succineidae) in southern Canada and the adjacent portions of the United States

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Extensive collecting and dissecting of live material shows that eight species of Oxyloma occur in southern and western Canada. Oxyloma haydeni is the common species across the Prairies from northern Ontario to southern Alberta. Oxyloma kanabensis occurs west of Edmonton, east of the Continental Divide, and north of Sundre, while 0. nuttalliana occurs west of the Continental Divide in southern British Columbia. Oxyloma groenlandica is found in the Yukon Territory and in the intermontane valleys in interior British Columbia. Oxyloma hawkinsi occurs sparsely, centred in the Okanagan area, but also persists as a probable remnant of the Hypsithermal interval at Exshaw, Alberta. Oxyloma retusa and 0. gouldi are confined to the southern portions of Ontario and Quebec. A new species, Oxyloma missoula, occurs in and adjacent to the areas occupied by the former Pluvial Lake Bonneville and Glacial Lake Missoula. All the species could have survived from before the last Wisconsinan ice advance since their distributions straddle the boundary of the glaciated area.

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ELECTRONIC FILE - Zoology: Invertebrates

Citation: Harris SA, Hubricht L. 1982. Distribution of the species of the genus Oxyloma (Mollusca, Succineidae) in southern Canada and the adjacent portions of the United States. Canadian Journal of Zoology 60(7):1607-1611.