Plesiotrygon Rosa [R. S.], Castello [H. P.] & Thorson [T. B.] 1987:449 Fem. Plesiotrygon iwamae Rosa, Castello & Thorson 1987. Type by original designation (also monotypic). •Valid as Plesiotrygon Rosa, Castello & Thorson 1987 -- (Compagno 1999:495 [ref. 25589], Carvalho et al. in Reis et al. 2003:23 [ref. 27061], Carvalho & Lovejoy 2011:18 [ref. 31182], Carvalho et al. 2011:1 [ref. 31264], Carvalho & Ragno 2011:103 [ref. 31309] with comments on p. 135, Lasso et al. 2011:174 [ref. 31491], Frederico et al. 2012:72 [ref. 31909], Carvalho et al. 2016:203 [ref. 34827], Carvalho 2016:620 [ref. 34997]). Current status: Valid as Plesiotrygon Rosa, Castello & Thorson 1987. Potamotrygonidae: Potamotrygoninae.