I have publish a paper about this
Iberê Farina Machado, Leonardo Moreira Bairos Felipe, Roger Borges da Silva et al. (2010) Amphibia, Anura, Centrolenidae, Vitreorana uranoscopa ( Müller , 1924 ): Distribution extension in the state of Rio Grande do Sul , Brazil, 410-411. In Checklist 6 (3).

http://www.checklist.org.br/getpdf?NGD071-10