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Ptychopegma
Taxonomy
Ptychopegma was named by Pojeta et al. (1977) [Sepkoski's age data: O Trem-l O Trem-u Sepkoski's reference number: 543]. It is not extant. Its type is Ptychopegma burgeri.
It was assigned to Ribeiriidae by Pojeta et al. (1977); and to Ribeirioida by Sepkoski (2002).
It was assigned to Ribeiriidae by Pojeta et al. (1977); and to Ribeirioida by Sepkoski (2002).
Species
P. burgeri (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1977 | Ptychopegma Pojeta et al. |
| 2002 | Ptychopegma 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.
Diagnosis
No diagnoses are available