Chasmocranus is a genus of three-barbeled catfishes native to South America.
Species There are currently 10 recognized species in this genus: Chasmocranus brachynema A. L. Gomes & Schubart, 1958 Chasmocranus brevior C. H. Eigenmann, 1912 Chasmocranus chimantanus Inger, 1956 Chasmocranus longior C. H. Eigenmann, 1912 Chasmocranus lopezi P. Miranda-Ribeiro, 1968 Chasmocranus peruanus C. H. Eigenmann & N. E. Pearson, 1942 Chasmocranus quadrizonatus N. E. Pearson, 1937 Chasmocranus rosae C. H. Eigenmann, 1922 Chasmocranus surinamensis (Bleeker, 1862) Chasmocranus truncatorostris Borodin, 1927
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