Abstract
The genus Aplastodiscus Lutz occurs from central and southeastern Brazil to adjacent Argentina and currently comprises 15 species. Faivovich et al. (2005) defined three species groups within the genus: A. albofrenatus, A. albosignatus and A. perviridis. The A. albosignatus group includes A. albosignatus (Lutz & Lutz 1938) A. callipygius (Cruz & Peixoto 1985), A. cavicola (Cruz & Peixoto 1985), A. flumineus (Cruz & Peixoto 1985), A. ibirapitanga (Cruz, Pimenta & Silvano 2003), A. leucopygius (Cruz & Peixoto 1985), and A. sibilatus (Cruz, Pimenta & Silvano 2003). Within this group only A. albosignatus and A. leucopygius have their larval forms described (Peixoto & Cruz 1983; Gomes & Peixoto 2002, respectively).
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