Preliminary Study on Phylogenetic Relationships and Zoogeography of Genus Boysidia Ancey,1881(Stylommatophora:Pupillidae) From China

The phylogeny of Chinese Boysidia has been investigated by cladistic methods using the Hennig 86 program(Version 1.5).Seventeen morphological characters were used in this analysis.Hypselostoma tubiferum and Gyliauchen hungerfordianus were chosen as outgroups.The preferred parsimonious cladogram was calculated by the command ie~* with progressive weighting method.In the resulting phylogenetic reconstruction,Seventeen Chinese species of genus Boysidia were divided into two groups that supported the proposition of J.Thiele(1931).On the basis of the Dispersal-Vicariance analysis,a historical biogeographical scenario was hypothesized: the form of the present distribution pattern of Boysidia in China may be related to the most strong uplift of Qinghai-Tibet Plateau.