MolluscaBase taxon details
Cyclocardia expansa (H. Takeda, 1953) †
1546817 (urn:lsid:marinespecies.org:taxname:1546817)
accepted
Species
Cyclocardia (Cyclocardia) expansa (H. Takeda, 1953) † · alternative representation
Venericardia expansa H. Takeda, 1953 † · unaccepted > superseded combination
marine, brackish, fresh, terrestrial
fossil only
(of Venericardia expansa H. Takeda, 1953 †) Takeda, H. (1953). The Poronai Formation (Oligocene Tertiary) of Hokkaido and south Sakhalin and its fossil fauna. <em>Hokkaido Association of Coal Mining Technologists, Studies on Coal Geology.</em> 3: 1-103, pls. 1-13.
page(s): 77, pl. 8, figs. 15-17, 19-21; pl. 11, fig. 13; pl. 12, figs. 1, 2, 4, 5, 7, 8, 10-12, 14-16, 18, 19, 22, 23, 25 [details]
page(s): 77, pl. 8, figs. 15-17, 19-21; pl. 11, fig. 13; pl. 12, figs. 1, 2, 4, 5, 7, 8, 10-12, 14-16, 18, 19, 22, 23, 25 [details]
Type locality contained in Hokkaido
type locality contained in Hokkaido [details]
Fossil range Oligocene
Fossil range Oligocene [details]
MolluscaBase eds. (2025). MolluscaBase. Cyclocardia expansa (H. Takeda, 1953) †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1546817 on 2025-09-11
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original description
(of Venericardia expansa H. Takeda, 1953 †) Takeda, H. (1953). The Poronai Formation (Oligocene Tertiary) of Hokkaido and south Sakhalin and its fossil fauna. <em>Hokkaido Association of Coal Mining Technologists, Studies on Coal Geology.</em> 3: 1-103, pls. 1-13.
page(s): 77, pl. 8, figs. 15-17, 19-21; pl. 11, fig. 13; pl. 12, figs. 1, 2, 4, 5, 7, 8, 10-12, 14-16, 18, 19, 22, 23, 25 [details]
basis of record Kafanov, A.; Ogasawara, K. & Marincovich Jr, L. (2001). Checklist and bibliography of the Cenozoic marine Bivalvia (Mollusca) of northeastern Asia (Russian Far East), 1968-1999. Mizunami Fossil Museum, Bulletin. 28: 1-138. [details] Available for editors
[request]
page(s): 77, pl. 8, figs. 15-17, 19-21; pl. 11, fig. 13; pl. 12, figs. 1, 2, 4, 5, 7, 8, 10-12, 14-16, 18, 19, 22, 23, 25 [details]
basis of record Kafanov, A.; Ogasawara, K. & Marincovich Jr, L. (2001). Checklist and bibliography of the Cenozoic marine Bivalvia (Mollusca) of northeastern Asia (Russian Far East), 1968-1999. Mizunami Fossil Museum, Bulletin. 28: 1-138. [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Fossil range Oligocene [details]
