Studies on Polyploid Amphibians: Karyotype Evolution and Phylogeny of the Genus Odontophrynus

Abstract

Based on the geographical distribution and karyotypes, in particular on satellite localization and number in the various species of Odontophrynus, a hypothetical phylogeny for this genus of anurans is suggested. Tetraploid 0. americanus could have originated by autopolyploidy from the diploid 0. americanus. These populations are already isolated to such an extent that both may be considered different species.