A karyosystematic study of the genus Bombina from China (Amphibia: Discoglossidae)

Abstract

Chromosome number, morphology and positions of Ag-NORs were determined for four Chinese species of Bombina. Chromosome numbers are: B. orientalis (2n=24, NF=48), B. maxima (2n=28, NF=56), B. microdeladigitora (2n=28, NF=56). The Ag-NORs of B. orientalis are located on the long arm of the 7th chromosome pair, where as those of the latter three are on the short arm of the 1 1th pair. The subdivision of Bombina into two subgenera is supported by the karyology. A close relation between Bombina and Discoglossus is suggested.