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摘要
The data on the karyotype of the viviparous lizard, Zootoca vivipara (Lichtenstein 1823), from six early unstudied geographical localities of northeastern Europe (Kaliningrad oblast, western Russia) are presented. As a result, two different chromosomal forms of the nominative subspecies were found: Russian (southeastern Kaliningrad oblast) and western (northwestern, central, southern, and southeastern Kaliningrad oblast). The Russian form is with 2n = 35 in the female karyotype, where W-sex chromosome is acrocentric (A) and the western form with 2n = 35 in the female karyotype, where the W-sex chromosome is submetacentric (SV). The former form was first found in one locality from the southeastern part of the oblast, near the border between Russia-Poland-Lithuania. This form is a rare one and, according to the chromosomal data, it colonizes the region from northeastern Poland and western Belarus, whereas the latter is presented in many parts of Kaliningrad oblast and colonizes this territory from other regions of Poland and Germany. Unlike central Europe, their mosaic distribution was not observed. However, two new zones (I - central eastern zone and II - narrow southeastern zone) of a secondary contact between these forms in northeastern Europe were discovered. The intraspecies karyotype diversity and several new zones of the secondary contact between the described forms may be assumed on the territory of different countries in the Baltic region (Germany, Poland, Lithuania, Latvia), as well as in Scandinavia (Finland, Sweden and Norway).
- 出版日期2015-1
