Species;"Ploidy level";"Karyotype formula";"NOR site";Reference "Xenopus tropicalis group" "X. tropicalis";"2n = 20";"2 M + 14 SM + 4 A";5q;"Tymowska and Fischberg 1973; Uehara et al. 2002" "X. epitropicalis";"4n = 40";"4M + 28 SM+ 8 A";5q;"Tymowska and Fischberg 1982; Tymowska 1991" "X. new tetraploid 1";"4n = 40";"4M + 28 SM+ 8 A";5q;"Tymowska 1991; Evans et al. 2004" "X. new tetraploid 2";"4n = 40";"4M + 28 SM+ 8 A";5q;"Evans et al. 2004" "Xenopus laevis group" "X. borealis";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";4p;"Tymowska and Fischberg 1973; Tymowska 1991" "X. clivii";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";4p;"Tymowska and Fischberg 1973; Tymowska 1991" "X. fraseri";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";6q;"Tymowska and Fischberg 1973; Tymowska 1991" "X. gilli";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";12p;"Tymowska and Fischberg 1973; Tymowska 1991" "X. laevis laevis";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";12p;"Tymowska 1991" "X. laevis bunyoniensis";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";–;"Tymowska 1991" "X. laevis petersi";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";–;"Tymowska and Fischberg 1973; Tymowska 1991" "X. laevis poweri";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";–;"Tymowska 1991" "X. laevis sudanensis";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";–;"Tymowska 1991" "X. laevis victorianus";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";–;"Tymowska and Fischberg 1973; Tymowska 1991" "X. largeni";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";–;"Tymowska 1991" "X. muelleri";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";4p;"Tymowska and Fischberg 1973; Tymowska 1991" "X. pygmaeus";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";6q;"Loumont 1986" "X. sp. nov. VI";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";4p;"Tymowska 1991" "X. sp. nov. IX";"4n = 36";"6 M+ 14 SM+ 2 ST + 14 T";12p;"Tymowska 1991" "X. amieti";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";5q;"Kobel et al. 1980" "X. andrei";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";18q;"Loumont 1983" "X. boumbaensis";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";"6p+ 4p";"Loumont 1983" "X. itombwensis";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";–;"Evans et al. 2008" "X. lenduensis";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";–;"Evans et al. 2011" "X. vestitus";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";12p;"Tymowska 1991" "X. wittei";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";12p;"Tymowska 1991" "X. sp. nov. X";"8n = 72";"12 M + 28 SM + 4 ST + 28 T";18q;"Tymowska 1991" "X. longipes";"12n = 108";"18 M + 42 SM + 6 ST + 42 T";7p;"Loumont and Kobel 1991" "X. ruwenzoriensis";"12n = 108";"18 M + 42 SM + 6 ST + 42 T";11q;"Tymowska and Fischberg 1973; Tymowska 1991" "X. cf. boumbaensis";"12n = 108";"18 M + 42 SM + 6 ST + 42 T";7p;"Evans 2007" "X. sp. nov. VIIIa";"12n = 108";"18 M + 42 SM + 6 ST + 42 T";7p;"Tymowska 1991" "Genus Pseudhymenochirus" "P. merlini";"2n = 20";"8 M + 4 SM + 6 ST + 2 T";10q;"Mezzasalma et al. 2015" "Genus Hymenochirus" "H. boettgeri";"2n = 20";"14 M + 2 SM + 4 ST";4p;"Mezzasalma et al. 2015" "Genus Pipa" "P. carvalhoi";"2n = 20";"6 M+ 4 SM+6 ST + 4 T";9q;"Present study" "8 M + 8 SM + 4 T†";"Mezzasalma et al. 2015" "P. pipa";"2n = 22";"8 M + 14 A";–;"Wickbom 1950" "6M + 2ST + 14A";"Morescalchi et al. 1970" "P. parva";"2n = 30";"30 T";–;"Morescalchi 1981"