falkneri, Potamotrygon Castex [M. N.] & Maciel [I.] 1963:56 [Anales del Museo Provincial de Ciencias Naturales "Florentino Ameghino," Sante Fe, Zoología v. 2 (no. 1); ref. 8015] Río Paraná medio, Entre Ríos, Argentina. Holotype: MFA 235. Paratypes: MFA 279 (1). Type information from Castex 1964:32 [ref. 20924] who said female holotype and male allotype, but original description said both were females. •Valid as Potamotrygon falkneri Castex & Maciel 1963 -- (Castex 1964:31 [ref. 20924], Gómez & Chebez 1996:46 [ref. 23791], Britski et al. 1999:21 [ref. 24147], Compagno 1999:495 [ref. 25589], Carvalho et al. in Reis et al. 2003:24 [ref. 27061], López et al. 2003:6 [ref. 27366], Menni 2004:70 [ref. 28131], Carvalho et al. 2011:26 [ref. 31264], Silva & Carvalho 2011:151 [ref. 31310], Barriga Salazar 2014:104 [ref. 35745], Koerber 2014:1 [ref. 33621], Sarmiento et al. 2014:117, 188 [ref. 35004], Mirande & Koerber 2015:8 [ref. 35117], Weigmann 2016:155 [ref. 34211], Carvalho et al. 2016:581 [ref. 34422], Carvalho 2016:562 [ref. 34666], Carvalho 2016:6 [ref. 34730], Carvalho 2016:632 [ref. 34997], Koerber et al. 2017:10 [ref. 35267], Reis et al. 2020:456 [ref. 38364] as cf. falkneri). Current status: Valid as Potamotrygon falkneri Castex & Maciel 1963. Potamotrygonidae: Potamotrygoninae. Distribution: South America: Paraná-Paraguay River basin (Argentina, Brazil, Bolivia, Ecuador, Paraguay and Peru). Habitat: freshwater.