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Taxonomy
Pinna bicuneata was named by Nomland (1917). Its type specimen is UCMP 11307, a shell, and it is a 3D body fossil. Its type locality is UCMP loc. 2284, which is in a Miocene marine sandstone in the Santa Margarita Formation of California.
It was recombined as Pinna (Atrina) bicuneata by Grant and IV and Gale (1931); it was recombined as Atrina bicuneata by Moore (1983).
It was recombined as Pinna (Atrina) bicuneata by Grant and IV and Gale (1931); it was recombined as Atrina bicuneata by Moore (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Pinna bicuneata Nomland p. 308 figs. pl. 15, figs. 1a-b |
| 1931 | Pinna (Atrina) bicuneata Grant, IV and Gale p. 146 |
| 1983 | Atrina bicuneata Moore p. A81 figs. Plate 23, figure 4 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Atrina bicuneata Nomland 1917
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Diagnosis
No diagnoses are available