The taxonomic status and diagnostic characteristics ofMeriones tristrami blackleri, M. t. lycaon, M. t. intraponticus, M. t. bodenheimeriandM. t. bogdanoviare discussed, based on material collected in Turkey. According to biomeţric and morphological comparisons, the specimens from southeastern and eastern Anatolia were found to be closer tobodenheimeriandbogdanovithan tolycaon. The white tail tip ofblackleri, the dorsal colour and baculum shape oflycaon, the white incisors ofintraponticus, and the short hind foot and the ear length ofbodenheimeriare characteristics that distinguish these taxa from one other. The diploid number of chromosomes is 72 inM. tristrami. However, the fundamental number is 76 inblackleriand 82 inlycaon, intraponticusandbodenheimeri.