Gymnorhamphichthys britskii Carvalho, Ramos & Albert, 2011: 401, fig. 1.

Paratypes: 9 lots, 33 specimens —NUP 1055, 6: Brasil, Mato Grosso, Chapada dos Guimarães, reservoir of Rio Manso, Nupélia staff, 14 Mar 2000 . NUP 1189, 1, 26 Apr 2003; NUP 3513, 1, 24 Jan 2002: Brasil, Mato Grosso, Santo Antônio do Leverger, rio Cuiabá, 15°58’26”S, 55°56’26”W, Nupélia staff. NUP 2192, 9, 1 c&s, 25 Mar 2000; NUP 10176 , 6, 26 Feb 2001. NUP 10177, 4, 25 Mar 2001: Brazil, Mato Grosso, Rosário Oeste, córrego Embaúba, tributary to rio Cuiabá, 14°55’S, 56°27’W, Nupelia staff. NUP 3422, 4 : Brasil, Mato Grosso, Chapada dos Guimarães, rio Casca, tributary of rio Manso, Chapada dos Guimarães, 15°01’S 55°31’W, Nupélia staff, Dec 2001 . NUP 7896, 1, 120 mm SL, 14 Jul 2009; NUP 7951, 1, 173 mm SL, 13 Jul 2009: Brazil, Paraná, São Jorge do Patrocínio, rio Paracaí, Nupélia staff .