laticeps, Potamotrygon Garman [S.] 1913:417, Pls. 31 (figs. 3-4), 55 (fig. 6) [Memoirs of the Museum of Comparative Zoology v. 36; ref. 1545] Obidos, Brazil. Holotype: MCZ 605-S. Non-types: MCZ 290-S (1), USNM 153588 [ex MCZ 301-S] (1). Type catalog: Hartel & Dingerkus 1997:xliv [ref. 23119]. We follow Carvalho et al. in Reis et al. 2003:25 [ref. 27061] in treating a holotype. •Valid as Potamotrygon laticeps Garman 1913 -- (Castex 1964:28 [ref. 20924], Hartel & Dingerkus 1997:xix [ref. 23119]). •Synonym of Potamotrygon motoro (Müller & Henle 1841) -- (Carvalho et al. in Reis et al. 2003:25 [ref. 27061], Litz & Koerber 2014:5 [ref. 33622], Mirande & Koerber 2015:8 [ref. 35117], Weigmann 2016:156 [ref. 34211], Koerber et al. 2017:10 [ref. 35267]). Current status: Synonym of Potamotrygon motoro (Müller & Henle 1841). Potamotrygonidae: Potamotrygoninae. Habitat: freshwater.