Karyotype of River Loach Turcinoemacheilus kosswigi B an arescu and Nalbant, 1964 (Cypriniformes, Balitoridae) from the Euphrates River, Turkey

Karyotype of river loach turcinoemacheilus kosswigi from the euphrates river, turkey was investigated using conventional giemsa-staining and c-banding. two females and two males were analyzed. diploid chromosome number was 2n= 50 in all specimens. the karyotype consisted of four pairs of metacentric (m), seven pairs of submeta (sm)- subtelocentric (st) and 14 pairs of acrocentric (a) chromosomes, the number of chromosome was nf= 72. no heteromorphic sex chromosomes were found. c-banded positive constitutive heterochromatin was found in the entire short arms of a pair of large m-sm chromosomes and in the centromeres of several chromosome pairs though to a lesser extent. karyotype and c-banding patterns of t. kosswigi were compared with those of other loaches.