Typový druh
Plesiotrygon iwamae Rosa, Castello & Thorson, 1987.
Původní popis
Rosa R. S., Castello H. P. & T. B. Thorson 1987. Plesiotrygon iwamae, a new genus and species of neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae). Copeia 1987 (no. 2). 447-458.