mollus.ca | Bibliography of terrestrial molluscs of Canada

Bibliography of the terrestrial molluscs of Canada compiled by Robert Forsyth

Taxonomy:
Superfamily Helicoidea
Family Polygyridae
Allogona (Dysmedoma) townsendiana (I. Lea 1838)

Forsyth (2004: 149)
Dall (1905: 25), as Polygyra townsendiana
COSEWIC (2002: 1)
Grass (1966: 4), as Polygyra townsendiana
Whiteaves (1906: 119), as Polygyra ptychophora
Lord (1866: 2: 36), as Helix townsendiana
Whiteaves (1902: 92), as Polygyra townsendiana
Pilsbry (1940: 883)
Cameron (1986: 345)