Three specimens of Blanus strauchi aporus are reported from Siirt province, southeast Anatolia. Previously, Mardin province was the easternmost locality known for B. s. aporus in Anatolia. Before this study, all localities recorded for the species were west of the Tigris River, which is perhaps an important dispersal barrier for animals. This study represents the first record of this species from east of the Tigris River in Turkey and extends its known distribution area by 150 km northeast. Additionally, twelve specimens from old localities were used for comparison. All specimens were evaluated with respect to morphological characters.