A case of mosaicism in the germinal line of Odontophrynus americanus (Dùmeril et Bibron. 1841)

the cytogenetic studies have special importance in the zoological research because by means of karyotype analysis they contribute to the identifi cation of different entities, facilitate the evaluation of the proximity or relationship degree among certain species and fi nally they contribute with fundamental data to the phylogenetic assessment (schmid et al., 1985; zampieri et al., 2004). the occurrence of polyploidy in different anuran families that appear as cryptic species highlights the importance of the cytogenetic study at the population level (valetti et al., 2009).