ocellata, Trygon hystrix var. Engelhardt [R.] 1912:647 [Zoologischer Anzeiger v. 39 (nos 21/22); ref. 17459] Southern shore of Mexiana, Brazil. Holotype (unique): ZSM [old collection] destroyed in WWII. Type catalog: Neumann 2006:279 [ref. 28925] •Valid as Potamotrygon ocellata (Engelhardt 1912) -- (Compagno 1999:495 [ref. 25589], Carvalho et al. in Reis et al. 2003:25 [ref. 27061], Almeida et al. 2008:85 [ref. 40894] as cf. ocellata, Carvalho et al. 2011:2 [ref. 31264] with question, Fontenelle et al. 2014:150 [ref. 33180] with question, Weigmann 2016:157 [ref. 34211] see remarks, Carvalho 2016:562 [ref. 34666], Carvalho 2016:6 [ref. 34730] with question, Carvalho 2016:642 [ref. 34997], Carvalho-Filho 2023:321 [ref. 40480]). Current status: Valid as Potamotrygon ocellata (Engelhardt 1912). Potamotrygonidae: Potamotrygoninae. Distribution: South America: Amapá and Pará (Brazil) endemic. Habitat: freshwater.