NORTH-WESTERN JOURNAL OF ZOOLOGY

The karyotypes of Leiurus abdullahbayrami Yagmur, Koc & Kunt, 2009 and Compsobuthus matthiesseni (Birula, 1905) from Turkey are presented for the first time. Both analyzed species have achiasmatic meiosis and the same number of holocentric chromosomes (2n=22) gradually decreasing in size. During the first meiotic division we observed tetravalent in one male of L. abdullahbayrann and octovalent in one male of C. matthiesseni. These types of multivalents may increase genetic variability and indicate reciprocal translocations within these species