Bivalvia - Cardiidia - Grammysiidae
Alternative combinations: Allorisma hannibalensis, Grammysia hannibalensis
Full reference: B. F. Shumard and G.C. Swallow. 1858. Descriptions of new fossils from the Coal Measures of Missouri and Kansas. Academy of Science of St. Louis Transactions 1:198-227
Belongs to Ectogrammysia according to R. D. Hoare et al. 1989
See also Shumard and Swallow 1858, Walcott 1884 and Williams 1943
Sister taxa: Ectogrammysia crassatis, Ectogrammysia inaffecta, Ectogrammysia prolata
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Carboniferous of United States (1: Iowa collection)
• Devonian of Canada (1: Alberta), United States (2: Missouri)
Total: 4 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.