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Euchasma
Taxonomy
Euchasma was named by Billings (1865) [Sepkoski's age data: Cm Dres O Llvi-l Sepkoski's reference number: 16,281]. It is not extant. Its type is Conocardium blumenbachium.
It was assigned to Rostroconchia by Pojeta et al. (1972); to Eopteriidae by Pojeta and Runnegar (1976); to Conocardioida by Sepkoski (2002); and to Euchasmidae by Bouchet et al. (2010).
It was assigned to Rostroconchia by Pojeta et al. (1972); to Eopteriidae by Pojeta and Runnegar (1976); to Conocardioida by Sepkoski (2002); and to Euchasmidae by Bouchet et al. (2010).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1865 | Euchasma Billings |
| 1933 | Euchasmella Kobayashi |
| 1972 | Euchasma Pojeta et al. p. 264 |
| 1976 | Euchasma Pojeta and Runnegar p. 48 |
| 2002 | Euchasma Sepkoski |
| 2002 | Euchasmella Sepkoski |
| 2010 | Euchasma Bouchet et al. |
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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.
G. †Euchasma Billings 1865
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†Euchasma blumenbachi Billings 1859
†Euchasma caseyi Pojeta et al. 1977
†Euchasma colliveri Cook and Camilleri 2001
†Euchasma eopteriformis Kobayashi 1933
†Euchasma jonesi Pojeta and Runnegar 1976
†Euchasma multistriata Kobayashi 1933
†Euchasma mytiliforme Pojeta and Runnegar 1976
†Euchasma swarkoi Pojeta et al. 1977
Invalid names: Euchasmella Kobayashi 1933 [synonym]
Diagnosis
No diagnoses are available