Scinax x-signatus (Spix 1824)
Holotype: ZSM 2494 /0 (lost).
Type locality: Bahia, Brazil.
Distribution: Regions 2, 3, 4, 5, 6. Eastern, southeastern, and southern Brazil, Colombia, Venezuela, Guyana, and Suriname. There are at least five species in Venezuela under this name [not three as Barrio-Amorós (2004) referred]. All inhabit non-heavily forested habitats, i.e., temporarily flooded savannas and dry forests to rainforests. Each of the five found in distinct locations: Maracaibo Lake Basin; Coastal Range; the Llanos region; Gran Sabana Region; and Isla de Margarita (Ugueto and Rivas Fuenmayor 2010).
Remarks: The type of Scinax x-signatus is lost (Hoogmoed and Gruber 1983), so it is not possible to review the x-signatus group until a neotype is designated.
Selected references: Spix (1824); Rivero (1969a); León-Ochoa (1975); Fouquette and Delahoussaye (1977); Hoogmoed and Gorzula (1979); Rada (1981); Hoogmoed and Gruber (1983); Duellman (1986, 1997); Ramo and Busto (1989, 1990); Duellman and Wiens (1992); Gorzula and Señaris (1998); Barrio-Amorós et al. (2004, 2011b); Tárano (2010); Ugueto and Rivas Fuenmayor (2010); Señaris et al. (2014).