Genus of original proposal almost certainly incorrect; allocation uncertain, possibly helicoid (Pilsbry 1946; Solem ... [details]
Genus of original proposal almost certainly incorrect; allocation uncertain, possibly helicoid (Pilsbry 1946; Solem ... [details]
La Rocque (1960) noted the similarity of "Helix" riparia White, 1876, from the Flagstaff Formation, Paleocene and ... [details]
Genus classification uncertain. [details]
Probably not an oreohelicid but perhaps a Helminthoglyptidae according to Roth (1986). [details]
Genus classification uncertain. [details]
Genus classification uncertain. [details]
U.S. Geological Survey Cenozoic Locality 20007, Montana: Gallatin County: NW1/4 SW1/4 sec. 36, T1N, R1W, Three ... [details]
U.S. Geological Survey Cenozoic Locality 20009, Montana: Jefferson County: NE1/4 NE1/4 NE1/4 sec. 11, T 2 N, R 1 W, ... [details]
U.S. Geological Survey Cenozoic Locality 20015, Montana: Broadwater County: NW1/4 SW1/4 sec. 3, T 2 N, R 1 E, Three ... [details]
U.S. Geological Survey Cenozoic locality 20011, Montana: Broadwater County: SE1/4 NW1/4 sec. 6, T 2 N, R 2 E, Three ... [details]
U.S. Geological Survey Cenozoic Locality 20015, Montana: Broadwater County: NW1/4 SW1/4 sec. 3, T 2 N, R 1 E, Three ... [details]
U.S. Geological Survey Cenozoic Locality 20007, Montana: Gallatin County: NW1/4 SW1/4 sec. 36, T1N, R1W, Three ... [details]
U.S. Geological Survey Cenozoic Locality 20015, Montana: Broadwater County: NW1/4 SW1/4 sec. 3, T 2 N, R 1 E, Three ... [details]