In order to investigate the conventional karyotype of Eptesicus serotinus (Schreber, 1774) in Turkey, four specimens were karyotyped. It was determined that the diploid number was 2n=50, the number of autosomal arms was FN=50, the X chromosome was large submetacentric, and the Y chromosome was dot-like acrocentric and the smallest chromosome of the set. All of the autosomes were acrocentric. A secondary constriction on a medium-sized acrocentric pair was encountered in most of the metaphase spreads examined.

In order to investigate the conventional karyotype of Eptesicus serotinus (Schreber, 1774) in Turkey, four specimens were karyotyped. It was determined that the diploid number was 2n=50, the number of autosomal arms was FN=50, the X chromosome was large submetacentric, and the Y chromosome was dot-like acrocentric and the smallest chromosome of the set. All of the autosomes were acrocentric. A secondary constriction on a medium-sized acrocentric pair was encountered in most of the metaphase spreads examined.