†Elliptio (Plesielliptio) Russell 1934 (freshwater mussel)
Bivalvia - Unionida - Unionidae
Alternative spellings: Plesielliptio, Protelliptio (Plesielliptio)
Parent taxon: Elliptio according to Russell 1934
See also Roth and Hartman 1998
Sister taxa: none
Subtaxa: Protelliptio (Plesielliptio) priscus
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Paleocene of Canada (5: Saskatchewan collections), United States (3: North Dakota, Utah)
• Cretaceous of Canada (3: Alberta), Mexico (2), United States (4: Arizona, Montana, Utah)
Total: 17 collections including 19 occurrences