Trapped on the Roof of the World:taxonomic diversity and evolutionary patterns of Tibetan Plateau endemic freshwater snails(Gastropoda:Lymnaeidae:Tibetoradix)  

作　　者：Maxim V.VINARSKI Parm Viktor VON OHEIMB Olga V.AKSENOVA Mikhail Yu.GOFAROV Alexander V.KONDAKOV Ivan O.NEKHAEV Ivan N.BOLOTOV 

机构地区：[1]Laboratory of Macroecology and Biogeography,Saint-Petersburg State University,Saint-Petersburg,Russia [2]Museum für Naturkunde-Leibniz Institute for Evolution and Biodiversity Science,Berlin,Germany [3]N.Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences,Arkhangelsk,Russia [4]Department of Applied Ecology,Saint-Petersburg State University,Saint-Petersburg,Russia [5]Northern(Arctic)Federal University,Arkhangelsk,Russia

出　　处：《Integrative Zoology》2022年第5期825-848,共24页整合动物学（英文版）

基　　金：funded by the Russian Foundation for Basic Research(project No.19-04-00270);the Ministry of Science and Higher Education of Russia(projects No.AAAA-A18-118012390161-9,No.АААА-А17-117033010132-2,No.МК-1720.2019.4,and No.0793-2020-0005);the Deutsche Forschungsgemeinschaft(WI 1902/7 and RI 809/21 within the priority programme 1372:“Tibetan Plateau:Formation–Climate–Ecosystems”[TiP]).

摘　　要：The high-elevation Tibetan Plateau(western China)is inhabited by a unique,though not particularly species-rich,community of organisms.We explored the species content and evolutionary history of the Tibetan Plateau endemic freshwater snail genus Tibetoradix.Phylogenetic relationships within the genus were reconstructed based on available sequence data.We used a single-rate Poisson Tree Processes approach for species delimitation and compared putative species-level clades with already described taxa.We found that the genus consists of at least 6 species,of which we described 4 as new to science.Shell and soft body morphology was examined and the radula in Tibetoradix was described for thefirst time.Based on ourfindings,the diversification of the genus did not result in a prominent morphological differentiation and a number of species can be regarded as morphologically cryptic.Single species found in different drainage areas indicate relatively good passive dispersal abilities of the snails.The allopatric distribution of the species could result from competitive exclusion between them.The absence of Tibetoradix spp.outside the Tibetan Plateau could be explained by a scenario of an“evolutionary trap”,where adaptations to high elevation conditions prevented the taxa from a successful colonization of lower elevations.

关 键 词：BIOGEOGRAPHY High Asia molecular phylogenetics morphology species delimitation 

分 类 号：Q95[生物学—动物学]