Bivalvia - Cardiidia - Grammysiidae
Alternative spelling: Lophoprothyris
Full reference: R. D. Hoare, M. J., I.I.I. Heaney, and R. H. Mapes. 1989. Bivalves (Mollusca) from the Imo Formation (Mississippian, Chesterian) of North-Central Arkansas. Journal of Paleontology 63(5):582-603
Parent taxon: Prothyris according to R. D. Hoare et al. 1989
See also Sepkoski 2002
Sister taxa: Prothyris (Amphikoilum), Prothyris (Prothyris) acuticarinata, Prothyris (Prothyris) cilindricus, Prothyris contorta, Prothyris elongatus, Prothyris meeki, Prothyris recta, Prothyris soleniformis, Prothyris stubblefieldi
Subtaxa: Prothyris (Lophoprothyris) crista
Type: Prothyris (Lophoprothyris) crista
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Carboniferous of United States (2: Arkansas collections)
Total: 2 collections each including a single occurrence