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Morphology Ecology and taphonomy   Age range and collections

Ptychopegma

Rostroconchia - Ribeirioida - Ribeiriidae

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).

Synonymy list
YearName and author
1977Ptychopegma Pojeta et al.
2002Ptychopegma Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
RankNameAuthor
phylumMollusca
classRostroconchia
orderRibeirioida
superfamilyRibeirioidea
familyRibeiriidae
genusPtychopegma

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