DE CARVALHO, M.R. & MAISEY, J.G. & GRANDE, L. (2004)
Freshwater stingrays of the Green River Formation of Wyoming (Early Eocene), with the description of a new genus and species and an analysis of its phylogenetic relationships (Chondrichthyes: Myliobatiformes). Bulletin of the American Museum of Natural History, 284: 1–136, 53 fig., 7 tabl.