Vertigo binneyana   (Sterki)


 
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Cylindrical Whorl Snail
(Vertigo binneyana)

 
syn. -

 
distribution:

Canada: Alberta (?); British Columbia; Manitoba; Ontario
USA: Iowa; Kansas; Montana; New Mexico

 
local name: -

 
size: ca. 0,2 cm (shell heigth)

extinction date: (?)

 
The Cylindrical Whorl Snail, which historically occurred in Iowa, Kansas, Montana, and New Mexico / USA as well as in British Columbia, Manitoba, and Ontario / Canada, seems to be extinct nowadays.

The species occurrred  in grass thatch and in the leaf litter of oak-aspen mixed woodlands, where it probably fed on vegetable detritus.

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All recent findings appeared / appear later as misidentified, other species. There is, however, a certain chance, that extant populations may still exist in the Canadian Alberta.

 
left:

Cylindrical Whorl Snail (Vertigo binneyana)


Depiction from: 'G. W. Tryon; H. A. Pilsbry: Manual of Conchology. Second series: Pulmonata, Vol. 25, 1918-1920'

http://www.biodiversitylibrary.org

 
References:

- Jeffrey C. Nekola; Brian F. Coles: Pupillid land snails of eastern North America. Amer. Malac. Bull. 28: 29-57. 2010