Lotic specialization in modern Asian newts(Caudata:Salamandridae):Phylogeny,historical biogeography,and ancestral traits based on combined DNA data  

作　　者：Yan-Peng Shen Kanto Nishikawa Jian-Ping Jiang Masafumi Matsui Ding-Qi Rao Natsuhiko Yoshikawa Atsushi Tominaga Daosavanh Sanamxay 

机构地区：[1]Graduate School of Human and Environmental Studies,Kyoto University,Yoshida Nihonmatsu-cho,Sakyo,Kyoto 606–8501,Japan [2]Graduate School of Global Environmental Studies,Kyoto University,Yoshida Honmachi,Sakyo,Kyoto 606–8501,Japan [3]Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu,Sichuan 610041,China [4]State Key Laboratory of Genetic Resources and Evolution,Kunming Institute of Zoology,Chinese Academy of Sciences,Kunming,Yunnan 650223,China [5]Department of Zoology,National Museum of Nature and Science,Tokyo,Amakubo 4–1–1,Tsukuba,Ibaraki 305–0005,Japan [6]Faculty of Education,University of the Ryukyus,Senbaru 1,Nishihara,Okinawa 903–0213,Japan [7]Faculty of Environmental Science,National University of Laos,Dong Dok Campus,Xaythany District,Vientiane Capital,7322,Lao PDR

出　　处：《Zoological Research:Diversity and Conservation》2024年第3期191-200,共10页动物学研究（多样性与保护）（英文）

基　　金：supported by the Japan Science and Technology Agency:Support for Pioneering Research Initiated by the Next Generation presented by the Division of Graduate Studies,Kyoto University(A94231600003)and the Nagao Project。

摘　　要：Pachytriton,and Paramesotriton,are primarily distributed across East Asia,displaying a broad range of environmental adaptations,including generalists inhabiting both lotic and lentic habitats and lotic specializations.Despite recent studies on their biogeographic history,how these species adapted to geographical changes remains unclear.In this study,divergence times and reconstructed ancestral traits were estimated based on phylogenetic analysis of mitochondrial and nuclear DNA sequences,totaling 4048 bp.Results indicated that the divergence between lotic-specialized and generalist species occurred during the middle to late Miocene(95% confidence interval(CI):16-13 million years ago(Ma)),correlating with the long-lasting arid period(14-12 Ma)and uplift of the Wuyi-Nanling mountains(15-11 Ma).Ancestral trait reconstruction revealed notable morphological changes associated with the emergence of lotic-specialized lineages.Specifically,male body size increased from 130 mm to 140 mm,and epibranchial traits shifted from thin to thick structures.Additionally,variation in tongue movability and skin texture were observed among lotic species.Each morphological shift is hypothesized to have an ecological basis,facilitating adaptation to specific environmental conditions.Overall,this study represents the first comprehensive attempt to elucidate the evolution of ancestral traits among divergent species of modern Asian newts,providing a deeper understanding of their adaptive responses to historical geographical and climatic changes.

关 键 词：Modern Asian newts PHYLOGENY Divergence time Trait reconstruction 

分 类 号：Q958[生物学—动物学]