Bivalvia - Thraciida - Periplomatidae
Parent taxon: Thracioidea according to J. G. Carter et al. 2011
See also Anelli et al. 2006, Bieler and Mikkelsen 2006, Bouchet et al. 2010, Coan et al. 2000, Glenn 1904, Hickman 2014, Nevesskaja 2009, Newell 1965, Stilwell et al. 2004, Vokes 1980 and Ward and Blackwelder 1987
Sister taxa: Burmesiidae, Cleidothaeridae, Myochamidae, Thraciidae
Subtaxa: Aperiploma Cochlodesma Periploma
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Greenland (1 collection), Jamaica (1), United States (16: California, Louisiana, South Carolina, Virginia)
• Pliocene of Belgium (4), Colombia (1), Costa Rica (4), Ecuador (1), the United Kingdom (2), United States (4: California, North Carolina), Venezuela (2)
• Miocene to Pliocene of United States (2: Alaska)
• Miocene of Antarctica (1), Belgium (2), Canada (1: British Columbia), Chile (8), Denmark (2), Germany (4), Japan (8), the Netherlands (2), New Zealand (1), the Russian Federation (13), United States (26: Alaska, California, Delaware, Florida, New Jersey), Venezuela (1)
• Oligocene to Miocene of Antarctica (2), the Russian Federation (1)
• Oligocene of Japan (10), the Russian Federation (12), United States (18: Alabama, Alaska, California, Mississippi, Oregon, Washington)
• Eocene to Oligocene of the Russian Federation (1)
• Eocene of Antarctica (9), Argentina (3), Japan (6), the Russian Federation (8), United States (56: Alabama, Arkansas, California, Colorado, Louisiana, Maryland, Mississippi, Oregon, South Carolina, Texas)
• Paleocene of Antarctica (5), Australia (1), the Russian Federation (2), United States (20: Alabama, California, Louisiana, Texas)
• Cretaceous of Canada (4: Alberta), Japan (5), Peru (1), Poland (2), United States (12: California, North Dakota, South Dakota, Tennessee, Texas)
Total: 285 collections including 322 occurrences