Classifications of the Elasmobranch Genus: Potamotrygon
Genus
PARATRYGON Dumeril 1865
Paratrygon DUMERIL 1865, type Trygon aiereba MUELLER & HENLE 1841 (non AIEREBA Marcgrave) by monotypy.
Disceus GARMAN 1877, type Disceus thayeri GARMAN 1913
Ellipesurus RIBEIRO 1907 (part)
? Elipesurus GARMAN 1913 (part)
P. AIEREBA ( Mueller & Henle ) 1841 Discusray; Raya Grande
Trygon aiereba MUELLER & HENLE 1841 (non AIEREBA Marcgrave) t/l; Rio Amazon, Brazil.
Trygon strogylopterus (sic) SCHOMBERGK 1843 (assumed lapsus for strongylopterus)
Trygon strongyloptera GUNTHER 1870 (emendation)
Disceus thayeri GARMAN 1913 t/l; Rio Para & Manaos, Brazil.
Range; Widely distributed throughout the Amazon & Orinoco systems.
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.
INDETERMINATE SPECIES
RAJA ORBICULARIS Bloch & Schneider 1801
Aiereba MARCGRAVE 1648 (Brazil ) Nat. Hist. of Brazil. This is not a Potamotrygonid, but an unidentifiable marine species of the genus Dasyatis.
Aiereba brasiliensibus JONSTON 1649 (on Aiereba MARCGRAVE 1648).
Raja ajereba WALBAUM 1792 (on Aiereba MARCGRAVE 1648). (Inadmissible work in Zoology) Raja orbicularis BLOCH & SCHNEIDER 1801 (on Aiereba MARCGRAVE 1648).
PASTINACA HUMBOLDTI Dumeril 1865
Pastenague de Humboldt ROULIN 1829 (Illustration.)
Pastinaca humboldtii DUMERIL 1865
Trygon garrapa SCHOMBURGK 1843 Sp. indet.
Elipesurus spinicauda SCHOMBURGK 1843. New genus and species but regarded by most authors as indeterminable.
Potamotrygon africana ARAMBOURG 1947 Sp. indet. based on caudal spines from fossil
palaeo-environments in Nanoropus ,Ethiopia.
Potamotrygon labratoris CASTEX 1963 Invalid name.
Potamotrygon pauckei CASTEX 1963 t/l; Rio Parana, Santa Fe, Argentina. Invalid name.
Potamotrygon alba CASTEX 1963 Sp. indet. Fossil.
Raja brasiliensis MUELLER & HENLE 1841. This is a nom. dub. in Rajidae which may or may not involve the indeterminate Dasyatid marine species Aiereba MARCGRAVE.