†Plinthicus Cope 1869 (eagle ray)
Chondrichthyes - Selachii - Myliobatidae
Full reference: E. D. Cope. 1869. Description of some extinct fishes previously unknown. Proceedings of the Boston Society of Natural History 12:310-317
Parent taxon: Myliobatidae according to M. Leriche 1942
Sister taxa: Aetobatis, Aetomylaeus, Apocopodon, Ceratopterina, Garabatis, Igdabatis, Leidybatis, Mobulinae, Myliobatina, Myliobatinae, Myliobatis, Pseudohypolophus, Pteromylaeus, Rhinoptera, Rhinopterinae
Subtaxa: Plinthicus stenodon
Type: Plinthicus stenodon
Ecology: nektonic carnivore