Bivalvia - Thraciida - Periplomatidae
Alternative spellings: Aelga, Periplima (Aelga)
Parent taxon: Periploma according to A. I. Kafanov et al. 2005
See also Kafanov and Ogasawara 2003 and Sepkoski 2002
Sister taxa: Periploma (Offadesma), 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 the Russian Federation (10 collections), United States (8: Alaska)
• Oligocene to Miocene of the Russian Federation (1)
• Oligocene of Japan (1), the Russian Federation (10)
• Eocene of Japan (1), the Russian Federation (5)
Total: 36 collections including 51 occurrences