caa a22 4500 445845287 CHVBK 20180317145357.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10709-012-9636-y doi (NATIONALLICENCE)springer-10.1007/s10709-012-9636-y Karyotypic differentiation via 2n reduction and a finding of a case of triploidy in anurans of the genus Engystomops (Anura, Leiuperidae) [Elektronische Daten] [C. Targueta, M. Rivera, L. Lourenço] The genus Engystomops is divided into two groups, namely the Duovox clade and the Edentulus clade. The species of Edentulus clade have karyotypes with 2n=22, while E. pustulatus and E. puyango, which belong to Duovox clade, have 2n=20. To investigate if 2n=20 is a synapomorphy of Duovox clade, we cytogenetically analyzed all the species of this group, except for E. puyango, in the present study. All of them had 2n=20, differing from the species of Edentulus clade. Since the species already karyotyped of the genus Physalaemus, which is considered to be the sister group of Engystomops, also have 2n=22, we conclude that the 2n reduction is a synapomorphy of Duovox clade. Despite the karyotypes of all the species of Duovox clade were very similar, they varied in the NOR pattern. In E. coloradorum, an additional NOR was found in one homologue of the chromosome pair 10 exclusively in all females, indicating that this could possibly be a sexual pair of the ZZ/ZW system. Also in this species, it was found the first case of natural polyploidy of the genus Engystomops. Springer Science+Business Media B.V., 2012 Chromosome nationallicence Anuran cytogenetics nationallicence Engystomops nationallicence Polyploidy nationallicence Sex chromosomes nationallicence Targueta C. Department of Structural and Functional Biology, State University of Campinas—UNICAMP, 13083-863, Campinas, SP, Brazil aut Rivera M. Escuela de Ciencias Biológicas, Pontifícia Universidad Católica Del Ecuador, Quito, Ecuador aut Lourenço L. Department of Structural and Functional Biology, State University of Campinas—UNICAMP, 13083-863, Campinas, SP, Brazil aut Genetica Springer Netherlands 139/10(2011-10-01), 1339-1347 0016-6707 139:10<1339 2011 139 10709 https://doi.org/10.1007/s10709-012-9636-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10709-012-9636-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Targueta C. Department of Structural and Functional Biology, State University of Campinas—UNICAMP, 13083-863, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Rivera M. Escuela de Ciencias Biológicas, Pontifícia Universidad Católica Del Ecuador, Quito, Ecuador aut NATIONALLICENCE 700 1- Lourenço L. Department of Structural and Functional Biology, State University of Campinas—UNICAMP, 13083-863, Campinas, SP, Brazil aut NATIONALLICENCE 773 0- Genetica Springer Netherlands 139/10(2011-10-01), 1339-1347 0016-6707 139:10<1339 2011 139 10709 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer