MolluscaBase source details
Pilsbry, H. A. (1913). Notes on some Oreohelices from Wyoming. The Nautilus. 27(5): 50-54, plate 3.
350001
Pilsbry, H. A.
1913
Notes on some Oreohelices from Wyoming.
The Nautilus
27(5): 50-54, plate 3
Publication
Oreohelix pygmaea Pilsbry, 1913 (original description)