MolluscaBase taxon details
Unio penultimus Gabb, 1864 †
1501591 (urn:lsid:marinespecies.org:taxname:1501591)
accepted
Species
fossil only
Gabb, W. M. (1864). Description of the Cretaceous fossils. <em>In: Meek, F. B. and Gabb, W. M. Geological Survey of California, Palaeontology of California.</em> 1: 55-243, pls. 9-32., available online at https://biodiversitylibrary.org/page/2062749
page(s): 182-183, pl. 24, fig. 164 [details]
page(s): 182-183, pl. 24, fig. 164 [details]
Note "From a bed of fine clay adjoining the...
Type locality "From a bed of fine clay adjoining the 'Peacock', or lower vein of coal, in the Peacock coal-mine, Mount Diablo District, Contra Costa County (Division B.)", California, USA; Eocene? [details]
MolluscaBase eds. (2021). MolluscaBase. Unio penultimus Gabb, 1864 †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1501591 on 2025-09-12
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original description
Gabb, W. M. (1864). Description of the Cretaceous fossils. <em>In: Meek, F. B. and Gabb, W. M. Geological Survey of California, Palaeontology of California.</em> 1: 55-243, pls. 9-32., available online at https://biodiversitylibrary.org/page/2062749
page(s): 182-183, pl. 24, fig. 164 [details]
basis of record Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 94 [details] Available for editors
[request]
page(s): 182-183, pl. 24, fig. 164 [details]
basis of record Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 94 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Type locality "From a bed of fine clay adjoining the 'Peacock', or lower vein of coal, in the Peacock coal-mine, Mount Diablo District, Contra Costa County (Division B.)", California, USA; Eocene? [details]
