MolluscaBase source details
Pilsbry, H. A. (1924). Californian helices. The Nautilus. 38(2): 54-55.
350115
Pilsbry, H. A.
1924
Californian helices.
The Nautilus
38(2): 54-55
Publication
Helix dupetithouarsi var. concursus Pilsbry, 1924 accepted as Helminthoglypta umbilicata (Pilsbry, 1898) (original description)
Helminthoglypta ferrissi Pilsbry, 1924 (original description)
Helminthoglypta ferrissi Pilsbry, 1924 (original description)