Typový druh
Porotergus gymnotus Ellis, 1912.
Původní popis
Eigenmann C. H. 1912. The freshwater fishes of British Guiana, including a study of the ecological grouping of species, and the relation of the fauna of the plateau to that of the lowlands. Mem. Carnegie Mus. v. 5 (no. 1). i-xxii + 1-578.
Přehled druhů
Porotergus apurensis Fernández-Yépez, 1968
nožovka apureská
Porotergus duende de Santana & Crampton, 2010
Porotergus gimbeli Ellis, 1912
nožovka Gimbelova
Porotergus gymnotus Ellis, 1912
nožovka amatucká
Porotergus maroon de Santana, Le Bail, Peixoto, You, Gianeti, Eon, Loeb, Mol & Covain, 2025
Porotergus sambaibensis Mendonça, Peixoto, Chamon, Akama & de Santana, 2025