South America: Rio Canoas basin or tributaries flowing into this basin that belongs to the rio Uruguay basin in Brazil.
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Menezes, N.A. and S.H. Weitzman 2011 A systematic review of Diapoma (Teleostei: Characiformes: Characidae: Stevardiinae: Diapomini) with descriptions of two new species from southern Brazil. Papéis Avulsos de Zoologia 51(5):59-82. (Ref. 86734)
http://www.fishbase.org/references/FBRefSummary.php?id=86734&speccode=66021
