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Polydiadema
Taxonomy
Polydiadema is a genus. It is not extant.
It was assigned to Centrechinidae by Grant and Hertlein (1938); to Pseudodiadematidae by Fell and Pawson (1966); and to Hemicidaroida by Sepkoski (2002).
It was assigned to Centrechinidae by Grant and Hertlein (1938); to Pseudodiadematidae by Fell and Pawson (1966); and to Hemicidaroida by Sepkoski (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1938 | Polydiadema Grant and Hertlein p. 16 |
| 1966 | Polydiadema Fell and Pawson p. U389 |
| 1993 | Girardema Vadet p. 88 |
| 2002 | Polydiadema 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.
G. †Polydiadema
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†Polydiadema joaquinensis Grant and Hertlein 1938
Invalid names: Girardema Vadet 1993 [synonym]
Diagnosis
No diagnoses are available