The second lineage is represented by P. meandricus
and P. antalyae, both of which are characterized by a less
reduced sensory canal system. Finally, the third lineage
includes P. handlirschi, P. anatolicus, and P. crassus,
which share such synapomorphies as small scales, high
number of vertebrae, and increased number of sensory
canal pores (Bogutskaya, 1992). The genus