Bivalvia - Cardiidia - Grammysiidae
Parent taxon: Grammysiidae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010
Sister taxa: Andinodesma, Arenigomya, Asketomorpha, Cercomyopsis, Cimitaria, Cuneamya, Cuneamyinae, Ectogrammysia, Fuchsella, Glyptoconcha, Grammysia, Leinzia, Sphenotus, Zaidiomysia, Protomya
Subtaxa: Cardiomorpha Grammysioidea Paraprothyris Prothyris Sedgwickia
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Triassic of Bosnia and Herzegovina (1 collection), India (1), Indonesia (1), New Zealand (1), United States (2: California)
• Permian of Australia (1), China (6), India (1), Indonesia (1), Malaysia (1), Pakistan (2), the Russian Federation (3), United States (6: Idaho, Texas)
• Carboniferous to Permian of the Russian Federation (1)
• Carboniferous of Antarctica (1), Ireland (1), the United Kingdom (6), United States (26: Alaska, Arkansas, California, Kentucky, Maryland, Missouri, Nevada, New Mexico, Ohio, Oklahoma, Utah, Virginia, West Virginia)
• Devonian of Antarctica (2), Argentina (1), Australia (1), Brazil (16), China (3), France (1), New Zealand (2), Poland (3), South Africa (4), the United Kingdom (4), United States (44: Florida, New York, Ohio)
• Silurian of China (2), the United Kingdom (5)
• Ordovician of United States (1: Ohio)
Total: 151 collections including 182 occurrences