Bivalvia - Cardiidia - Grammysiidae
Alternative spelling: Allorisma (Sedgwickia)
Parent taxon: Grammysiinae according to D. M. C. Machado et al. 2021
See also Meek 1871, Sepkoski 2002 and Vokes 1980
Sister taxa: Cardiomorpha, Grammysioidea, Paraprothyris, Prothyris
Subtaxa: Sedgwickia guangdongensis Sedgwickia lianxianensis Sedgwickia topekaensis
Ecology: facultatively mobile deep infaunal suspension feeder
Distribution:
• Permian of China (5 collections), Malaysia (1), United States (1: Texas)
• Carboniferous of the United Kingdom (3), United States (9: Arkansas, New Mexico, Ohio, Oklahoma, Virginia, West Virginia)
• Devonian of China (1), Poland (3)
• Silurian of the United Kingdom (5)
• Ordovician of United States (1: Ohio)
Total: 29 collections including 30 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.