1 Prelabral chaetae 3+3; tenent hair acuminate....................................... P. kelasuricus Martynova, 1969 *
- Prelabral chaetae 2+2; tenent hair clavate.................................................................. 2 2 Tibiotarsi with 001 spine-like chaetae..................................................................... 3
- Tibiotarsi with 002 spine-like chaetae..................................................................... 4
3 Eye patch with 4–5 eyes; tenaculum with 1 chaeta.................................. P. sorosi Kniss & Thibaud, 1999
- Eye patch with 6 eyes; tenaculum with 3–4 chaetae........................... P. jeleznovodski Kniss & Thibaud, 1999
4 Dens with very narrow spines.................................................. P. baschkiricus (Skorikow, 1900)
- Dens with normal spines............................................................................... 5
5 Teeth on empodium present; Abd. I and IV with 2 and 5 Mc respectively................... P. unidentatus (Börner, 1901)
- Teeth on empodium absent; Abd. I and IV with 3 and 3 Mc respectively.............. P. carpaticus Rusek & Weiner, 1978