Hydrographic map of the southeast coast of Brazil with the collection points of Hypostomus affinis. Point “a” corresponds to Cunha/SP and point “b” corresponds to Itaocara/RJ. Hydrographic basins: Paraíba do Sul (in purple), São Francisco (in green), Upper Paraná (in red) and Rios Costeiros (in blue).

 
 
  Part of: Brandão KO, Rocha-Reis DA, Garcia C, Pazza R, Almeida-Toledo LF, Kavalco KF (2018) Studies in two allopatric populations of Hypostomus affinis (Steindachner, 1877): the role of mapping the ribosomal genes to understand the chromosome evolution of the group. Comparative Cytogenetics 12(1): 1-12. https://doi.org/10.3897/CompCytogen.v12i1.22052