Synonyma
Pastenagus Roulin, 1829 ― Pastenagus humboldtii Roulin, 1829
Typový druh
Trygon hystrix Müller & Henle, 1841
Původní popis
Garman S. W. 1877. On the pelvis and external sexual organs of selachians, with especial references to the new genera Potamotrygon and Disceus (with descriptions). Proc. Boston Soc. Nat. Hist. v. 19. 197-214.
Přehled druhů
Potamotrygon adamastor Fontenelle & Carvalho, 2017
Potamotrygon albimaculata Carvalho, 2016
Potamotrygon amandae Loboda & Carvalho, 2013
Potamotrygon amazona Fontenelle & Carvalho, 2017
Potamotrygon boesemani Rosa, Carvalho & Almeida Wanderley, 2008
Potamotrygon brachyura (Günther, 1880)
trnucha krátká
Potamotrygon constellata (Vaillant, 1880)
trnucha okrouhlá
Potamotrygon falkneri Castex & Maciel, 1963
trnucha Falknerova
Potamotrygon garmani Fontenelle & Carvalho, 2017
Potamotrygon henlei (Castelnau, 1855)
Potamotrygon histrix (Müller & Henle, 1839)
trnucha mramorovaná
Potamotrygon humerosa Garman, 1913
trnucha statná
Potamotrygon jabuti Carvalho, 2016
Potamotrygon leopoldi Castex & Castello, 1970
trnucha Leopoldova
Potamotrygon limai Fontenelle, da Silva & Carvalho, 2014
Potamotrygon magdalenae (Duméril, 1865)
trnucha magdalenská
Potamotrygon marinae Deynat, 2006
Potamotrygon marquesi Silva & Loboda, 2019
Potamotrygon motoro (Müller & Henle, 1841)
trnucha skvrnitá
Potamotrygon ocellata (Engelhardt, 1912)
Potamotrygon orbignyi (Castelnau, 1855)
trnucha Orbignyho
Potamotrygon pantanensis Loboda & Carvalho, 2013
Potamotrygon rex Carvalho, 2016
Potamotrygon scobina Garman, 1913
trnucha tocantinská
Potamotrygon schroederi Fernández-Yépez, 1958
trnucha Schroederova
Potamotrygon schuhmacheri Castex, 1964
trnucha Schumacherova
Potamotrygon signata Garman, 1913
trnucha paranahybská
Potamotrygon tatianae Silva & Carvalho, 2011
Potamotrygon tigrina Carvalho, Sabaj Pérez & Lovejoy, 2011
Potamotrygon wallacei Carvalho, Rosa & Araújo, 2016
Potamotrygon yepezi Castex & Castello, 1970
trnucha venezuelská
