New data on distribution of amphibians and reptiles in the Aral Sea Basin and surrounding areas of Kazakhstan. Part I. The Green Toads of Bufo viridis complex (Amphibia: Anura)

First the data on distribution of the toads of Bufo viridis complex are presented for Aral Sea Basin and surrounding areas of Southern and Western Kazakhstan. Karyological analysis revealed a presence of diploid toad populations in the valley of the middle and low flows of Syr-Darya River; in the northern coast of Aral Sea and the desert areas between the last and Irgyz-Turgay Basin; in the northern part of Karatau Range. The only tetraploid population was discovered in the central part of Karatau Range.