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Taxonomy
Pachydesma was named as a genus. It is extant.
It was reranked as Tivela (Pachydesma) by Clark (1915), Wagner and Schilling (1923) and Oldroyd (1925).
It was assigned to Tivela by Clark (1915), Wagner and Schilling (1923) and Oldroyd (1925); and to Veneroida by Sepkoski (2002).
It was reranked as Tivela (Pachydesma) by Clark (1915), Wagner and Schilling (1923) and Oldroyd (1925).
It was assigned to Tivela by Clark (1915), Wagner and Schilling (1923) and Oldroyd (1925); and to Veneroida by Sepkoski (2002).
Synonyms
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Synonymy list
Year | Name and author |
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1837 | Trigonella Conrad |
1915 | Tivela (Pachydesma) Clark p. 462 |
1923 | Tivela (Pachydesma) Wagner and Schilling p. 255 |
1925 | Tivela (Pachydesma) Oldroyd p. 6 |
2002 | Pachydesma Sepkoski |
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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.
Subg. Tivela (Pachydesma)
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†Pachydesma sulcataria Vokes 1939
†Tivela (Pachydesma) diabloensis Clark 1915
†Tivela (Pachydesma) gabbi Clark 1915
†Tivela (Pachydesma) inezana Conrad 1856
Tivela (Pachydesma) stultorum Mawe 1823
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Invalid names: Cytherea (Trigonella) crassatelloides Conrad 1837 [synonym], Tivela scarificata Berry 1940 [synonym]
Invalid names: Trigonella Conrad 1837 [replaced]
Diagnosis
No diagnoses are available