Molecular phylogeographic analyses and species delimitations reveal that Leopoldamys edwardsi(Rodentia:Muridae)is a species complex  

作　　者：Haotian LI Lingming KONG Kaiyun WANG Shuping ZHANG Masaharu MOTOKAWA Yi WU Wenquan WANG Yuchun LI 

机构地区：[1]Marine College,Shandong University,Weihai,China [2]Institute of Ecology and Biodiversity,Shandong University,Jinan,China [3]The Kyoto University Museum,Kyoto University,Kyoto,Japan [4]College of Life Science,Guangzhou University,Guangzhou,China [5]Institute of Tropical Biosciences and Biotechnology,Chinese Academy of Tropical Agricultural Sciences,Haikou,China

出　　处：《Integrative Zoology》2019年第5期494-505,共12页整合动物学（英文版）

基　　金：the Major Internation­al(Regional)Joint Research Project of NSFC(Grant No.31110103910);the Japan Society for the Promotion of Science(JSPS)Core-to-Core Program B Asia-Afri­ca Scientific Platforms,and the JSPS Grants-in-Aid for Scientific Research(26304009).

摘　　要：Leopoldamys edwardsi is a species with wide distribution ranges in southern China but is not discussed in stud­ies on geographic variation and species differentiation.We used 2 mitochondrial(Cytb,CO1)and 3 nuclear(GHR,IRBP and RAG1)genes to clarify species phylogeography and geographical differentiation.Maximum likelihood(ML)and Bayesian phylogenetic inference(BI)trees consistently indicated that L.edwardsi is a spe­cies complex containing 3 main lineages with high Kimura-2-parameter(K2P)divergences(i.e.lineages LN,LS and LHN)found in the northern and southern China and Hainan Island,respectively.The 3 species delimitation methods,automated barcoding gap discovery,Bayesian poisson tree process analysis and Bayesian phylogenet­ics and phylogeography,consistently supported the existence of cryptic species.Divergence times among the main lineages were inferred to be during the Pleistocene,with LHN/LS split at 1.33 Ma and LN/(LHN+LS)at 2.61 Ma;the diversifications of L.edwardsi complex might be caused by the rapid uplifts of Tibetan Plateau,paleo­climate change and complex topography.The divergence between LHN and LS was probably related to the sepa­ration of Hainan Island from the mainland via the formation of the Qiongzhou Strait.Lineages LN and(LS+LHN)likely diverged due to the Wuyi-Nanling mountain range forming a dispersal barrier.Our results suggested that L.edwardsi complex contains at least 3 distinct species:LHN represents L.hainanensis,endemic to Hainan Island and previously considered as a subspecies L.e.hainanensis;LS represents a cryptic species distributed through­out the southern Chinese continent;and LN represents the nominotypical species L.edwardsi.

关 键 词：ancient hybridization cryptic species Leopoldamys edwardsi complex Leopoldamys hainanensis species delimitation 

分 类 号：Q95[生物学—动物学]