Cernyshova T. Limax (Linnaeus, 1758) (Pulmonata, Limacidae) genus molluscs in the fauna of Ukraine genetic structure of the populations, karyological and morphological peculiarities

Amphimixis dominates only in L. maximus whereas in L. cinereoniger and L. flavus there is the equal genotypes distribution, so amphimixis occurs only in natural populations and synantropic ones are represented with fixed genetic lines. The tendency to these two species biotypes differentiation in reproductive system distant parts parameters is observed. L. ecarinatus allozymic spectra structure is species specific and the absence of its changeability proves that the fauna of Ukraine it is represented with the single biotype. L. flavus diploid set characteristics (2n=62, NF=124) and gaploid chromosome numbers (n=31) in the three species studied are established for the first time in ukrainian populations. The species studied distinctly differentiate in allozymic spectra and morphometric parameters.