A Classification of the Recent Elasmobranchii

Potamotrygon humerosus GARMAN 1913 t/l;Monte Alegre,R.Amazon,Para, Brazil.
Range; Lower Amazon & Para systems from Tapajos to Amazon mouth.
P. SCHROEDERI Yepez 1957 Rosetted River Stingray; Raya guacamaya
Potamotrygon schroederi YEPEZ 1957 t/l;Boca Apurito, Rio Apure, Brazil.
Range; R.Orinoco and R.Negro from headwaters to Manaos.
P. FALKNERI (Castex in) Castex and Maciel 1963 Largespot River Stingray;
Raya reticulada, raya fina, raya pititi
Potamotrygon vistrix CASTEX 1963 (lapsus for histrix)
Potamotrygon hystrix CASTEX 1963 (non MUELLER & HENLE)
Potamotrygon falkneri CASTEX 1963 t/l;Puerto de Santa Fe,Rio Parana, Argentina
Potamotrygon menchacai ACHENBACH 1967 t/l;Rio Colastine, Parana system,Santa Fe,Argentina.
Range; N.E. Argentina, Central Paraguay and West Brazil in La Plata system.
P. SCHUEMACHERI Castex 1964 Parana River Stingray
Potamotrygon schuemacheri CASTEX 1964 t/l; Rio Colastine Sur, Lower Parana, Santa Fe,
Argentina
Range; Known only from the holotype.
P. CASTEXI Castello & Yagolkowski 1969 Vermiculate River Stingray; Raya acordonada
Potamotrygon castexi CASTELLO & YAGOLKOWSKI 1969 t/l;Rosario,Rio Parana, Argentina.
Potamotrygon nistrix McCORMICK, ALLEN & YOUNG 1963 (illus.) (lapsus)
Range;Lower Parana and Paraguay systems. R. Guapore in Upper Amazon system. Possibly Rio
Trombetas in Lower Amazon system.
P. LEOPOLDI Castex & Castello 1970 Whiteblotched or Polkadot River Stingray
Potamotrygon leopoldi CASTEX & CASTELLO 1970 t/l; Upper Rio Xingu, Brazil
Range; Probably endemic to Xingu system.
P. YEPEZI Castex & Castello 1970 Maracaibo River Stingray
Potamotrygon yepezi CASTEX & CASTELLO 1970 t/l; Rio Palmar, R.Maracaibo
system,Venezuela.
Range; R.Maracaibo system
Potamotrygon sp. A RICARDO ROSA 1985 cf. motoro Material from the Rio Solimoes (Upper
Amazon) and the Ucayali from Contamana, Peru to Obidos, Brazil. May be an intraspecific variant of
motoro or a new species.
Potamotrygon sp. B RICARDO ROSA 1985 cf. motoro / ocellata. Material from Rio Corantijn,
Surinam
Possible morph of motoro or ocellata.
Potamotrygon sp. no. 1 MARCELO CARVALHO AMNH Holotype
Genus PLESIOTRYGON Rosa,Castello & Thorsen 1987
Plesiotrygon ROSA, CASTELLO & THORSEN 1987 type Plesiotrygon iwamae ROSA et. al. 1987
P. IWAMAE Rosa et al 1987 Longtail River
Stingray
Plesiotrygon iwamae ROSA,CASTELLO & THORSEN 1987 t/l; Upper Amazon,Brazil
Range; Upper and Middle Amazon of Ecuador & Brazil.
POTAMOTRYGONIDAE new species ISHIHARA & TANIUCHI 1995. Unnamed genus & species
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