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Karyotype Analysis of Two Species of Takydromus from Heilongjiang Province

QIN Shu-mian,ZHAO Wen-ge(College of Life Science and Technology,Harbin Normal University,Harbin 150025,China)  
The karyotypes of Takydromus amurensis and T.wolteri from Heilongjiang Province were examined using medulla cells and the colchicine-hypotonic air-dry technique.The results showed that the number of diploid chromosomes in the two species was 38 and were composed of 18 pairs of euchromosomes and a pair of sex chromosome,including 17 pairs of telocentric chromosomes and a pair of spot chromosomes.The sex chromosome was of the type ZW.According to karyotypic characteristics,they are all primitive species within Lacertiformes.
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