Potamotrygon

Potamotrygon é un xénero de raias de auga doce da familia Potamotrygonidae que é orixinario dos ríos de América do Sur. É un xénero de animais común nos acuarios.

Ó igual que outras raias, as especies do xénero teñen dardos velenosos na base das súas colas, e as súas picadas son perigosas para os humanos. Dise que os indíxenas de América do Sur temen máis as raias que as pirañas.

 Especies 
Existen máis de 30 especies recoñecidas do xénero:

 Potamotrygon adamastor Fontenelle, J. P. & de Carvalho, M. R., 2017Fontenelle, J. P. & de Carvalho, M. R. (2017): Systematic revision of the "Potamotrygon scobina" Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography. Zootaxa, 4310 (1): 1–63.
 Potamotrygon albimaculata M. R. de Carvalho, 2016Carvalho, M.R.d. (2016): Description of two extraordinary new species of freshwater stingrays of the genus Potamotrygon endemic to the rio Tapajós basin, Brazil (Chondrichthyes: Potamotrygonidae), with notes on other Tapajós stingrays. Zootaxa, 4167 (1): 1–63.
 Potamotrygon amandae Loboda & M. R. de Carvalho, 2013Loboda, T.S. & Carvalho, M.R.d. (2013): Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae).  Neotropical Ichthyology, 11 (4): 693–737.
 Potamotrygon amazona Fontenelle, J. P. & de Carvalho, M. R., 2017
 Potamotrygon boesemani R. S. Rosa, M. R. de Carvalho & Wanderley, 2008Rosa, R.S., Carvalho, M.R.d. & Wanderley, C.d.A. (2008): Potamotrygon boesemani (Chondrichthyes: Myliobatiformes: Potamotrygonidae), a new species of Neotropical freshwater stingray from Surinam. Neotropical Ichthyology, 6 (1): 1–8. 
 Potamotrygon brachyura (Günther, 1880)
 Potamotrygon constellata (Vaillant, 1880)
 Potamotrygon falkneri Castex & Maciel, 1963
 Potamotrygon garmani Fontenelle, J. P. & de Carvalho, M. R., 2017
 Potamotrygon henlei (Castelnau, 1855)
 Potamotrygon histrix (J. P. Müller & Henle, 1834)
 Potamotrygon humerosa Garman, 1913
 Potamotrygon jabuti M. R. de Carvalho, 2016
 Potamotrygon leopoldi Castex & Castello, 1970
 Potamotrygon limai Fontenelle, J. P. C. B. Silva & M. R. de Carvalho, 2014Fontenelle, J.P., Silva, J.P.C.B.d. & Carvalho, M.R.d. (2014): Potamotrygon limai, sp. nov., a new species of freshwater stingray from the upper Madeira River system, Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa, 3765 (3): 249–268.
 Potamotrygon magdalenae (A. H. A. Duméril, 1865)
 Potamotrygon marinae Deynat, 2006
 Potamotrygon marquesi Silva & Loboda, 2019
 Potamotrygon motoro (J. P. Müller & Henle, 1841)
 Potamotrygon ocellata (Engelhardt, 1912)
 Potamotrygon orbignyi (Castelnau, 1855)
 Potamotrygon pantanensis Loboda & M. R. de Carvalho, 2013
 Potamotrygon rex M. R. de Carvalho, 2016Carvalho, M.R.d. (2016): Potamotrygon rex, a new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the middle and upper rio Tocantins, Brazil, closely allied to Potamotrygon henlei (Castelnau, 1855). Zootaxa, 4150 (5): 537–565.
 Potamotrygon schroederi Fernández-Yépez, 1958
 Potamotrygon schuhmacheri Castex, 1964
 Potamotrygon scobina Garman, 1913
 Potamotrygon signata Garman, 1913
 Potamotrygon tatianae J. P. C. B. Silva & M. R. de Carvalho, 2011
 Potamotrygon tigrina M. R. de Carvalho, Sabaj Pérez & Lovejoy, 2011Carvalho, M.R.d., Sabaj Pérez, M.H. & Lovejoy, N.R. (2011): Potamotrygon tigrina, a new species of freshwater stingray from the upper Amazon basin, closely related to Potamotrygon schroederi Fernandez-Yépez, 1958 (Chondrichthyes: Potamotrygonidae). Zootaxa, 2827: 1–30.
 Potamotrygon wallacei M. R. de Carvalho, R. S. Rosa & M. L. G. Araújo, 2016Carvalho, M.R.d., Rosa, R.S. & Araújo, M.L.G. (2016): A new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the smallest species of Potamotrygon. Zootaxa, 4107 (4): 566-586.
 Potamotrygon yepezi Castex & Castello, 1970

 Especies extintas (fósil) 
Coñécense tres especies extintas a través de restos fósiles do Terciario:Chabain, Jules; Pierre-Olivier Antoine; Ali J. Altamirano-Sierra; Laurent Marivaux; François Pujos; Rodolfo Salas Gismondi; Sylvain Adnet (2017). Cenozoic batoids from Contamana (Peruvian Amazonia) with focus on freshwater potamotrygonins and their paleoenvironmental significance. Geobios 50: 389–400. 

†Potamotrygon canaanorum
†Potamotrygon contamanensis
†Potamotrygon rajachloeae

 Notas 

Categoría:Potamotrygon