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Representative idiograms of Hepsetus odoe and Pyrrhulina (Lebiasinidae) (data from Moraes et al., 2017) and Boulengerella (Ctenoluciidae) (data from de Souza E Sousa et al., 2017) species. The distribution of the 18S and the 5S rDNAs for each species are highlighted in red and green, respectively.
