Karyotypes of P. ninae, P. aserbeidschanus and P. australorossicus sp. n. Trivalents are indicated by arrows. a P. ninae, sample 2014VL34, MI, n=34 b P. ninae, sample 2014VL39, MI, n=33 c P. ninae, sample 2014VL33, MI, n=32 bivalents + 1 trivalent (heterozygote for fusion/fission) d P. ninae, sample 2014VL60, n=32 bivalents + 1 trivalent (heterozygote for fusion/fission) e P. ninae, sample 2014VL33, MII, n=33 f P. aserbeidschanus, sample 05A406, MI, n=32 g P. aserbeidschanus, sample 05A387, MI, n=33 h P. aserbeidschanus, sample 05A387, MI, n=33 i P. australorossicus sp. n., sample DK-27-97-1, MI, n=23. Bar = 10 μ.