MolluscaBase source details
Pilsbry, H. A. & Cooke, C. M. (1922). The identity of Helix depressiformis and H. prostrata Pease. The Nautilus. 36(1): 17.
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Pilsbry, H. A. & Cooke, C. M.
1922
The identity of <i>Helix depressiformis</i> and <i>H. prostrata</i> Pease
The Nautilus
36(1): 17
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Helix depressiformis Pease, 1865 accepted as Trochomorpha swainsoni (L. Pfeiffer, 1846) (source of synonymy)
Helix prostrata Pease, 1865 accepted as Menetus opercularis (A. Gould, 1847) (source of synonymy)
Planamastra peasiana Hyatt & Pilsbry, 1911 (source of synonymy)
Helix prostrata Pease, 1865 accepted as Menetus opercularis (A. Gould, 1847) (source of synonymy)
Planamastra peasiana Hyatt & Pilsbry, 1911 (source of synonymy)