MolluscaBase taxon details
Helisoma parallelum A. B. Leonard & Franzen, 1944 †
1420153 (urn:lsid:marinespecies.org:taxname:1420153)
accepted
Species
fossil only
Leonard, A.B.; Franzen, D.S. (1944). Mollusca of the Laverne Formation (Lower Pliocene) of Beaver County, Oklahoma. <em>The University of Kansas Science Bulletin.</em> 30(1): 15-39., available online at https://biodiversitylibrary.org/page/2994493
page(s): 26-27, pl. 5, fig. 16 [details]
page(s): 26-27, pl. 5, fig. 16 [details]
Note Locality No. 3, six and one-half miles south,...
Type locality Locality No. 3, six and one-half miles south, one-half mile west of Gate, Beaver county, Oklahoma, United States; Clarendonian, middle to late Miocene [details]
MolluscaBase eds. (2021). MolluscaBase. Helisoma parallelum A. B. Leonard & Franzen, 1944 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1420153 on 2025-09-11
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original description
Leonard, A.B.; Franzen, D.S. (1944). Mollusca of the Laverne Formation (Lower Pliocene) of Beaver County, Oklahoma. <em>The University of Kansas Science Bulletin.</em> 30(1): 15-39., available online at https://biodiversitylibrary.org/page/2994493
page(s): 26-27, pl. 5, fig. 16 [details]
page(s): 26-27, pl. 5, fig. 16 [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Type locality Locality No. 3, six and one-half miles south, one-half mile west of Gate, Beaver county, Oklahoma, United States; Clarendonian, middle to late Miocene [details]
