This species is distinguished from other species of the O. angorae group by the following characters: with a very slender caudal peduncle, its depth 2.2-2.6 times in its length (vs. 1.3-1.6 in O. anatolicus, 1.5-1.8 in O. angorae and O. germencicus, and 1.5-1.9 in O. eregliensis); differs from O. anatolicus, O. angorae, O. eregliensis by having a shorter head, the head length 21-24% SL (vs. 24-27 in O. anatolicus; 23-26 in O. angorae, 24-26 in O. eregliensis), caudal fin moderately deep emarginate (vs. slightly emarginate or almost truncate), the shortest middle caudal-fin ray is 71-85% of the longest ray of the upper caudal-fin lobe (vs. 84-93 in O. anatolicus; 88-92 in O. angorae, 83-91 in O. eregliensis), no depigmented stripe along the anterior part of the lateral line (vs. present in O. angorae); differs from O. germencicus by lacking scales on the belly (vs. present) (Ref. 131061).