Bivalvia - Thraciida - Periplomatidae
Alternative spelling: Offadesma
Parent taxon: Periploma according to L. R. Cox et al. 1969
See also Sepkoski 2002
Sister taxa: Periploma (Aelga), Periploma (Periploma), Periploma acuta, Periploma ariei, Periploma binominata, Periploma caribana, Periploma claibornense, Periploma clarki, Periploma collardi, Periploma cryphia, Periploma discus, Periploma eodiscus, Periploma iesakai, Periploma inaequivalve, Periploma japonica, Periploma johnseni, Periploma margaritacea, Periploma margaritaceum, Periploma ovatum, Periploma peralta, Periploma santaecrucis, Periploma stewartvillensis, Periploma subgracile, Periploma venezuelana
Subtaxa: none
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Miocene of New Zealand (1 collection)
• Cretaceous of Japan (2)
Total: 3 collections each including a single occurrence