宁夏兽类两新纪录——川西缺齿鼩和小纹背鼩鼱

Two new records of Chodsigoa hypsibia and Sorex bedfordiae from Ningxia in China

川西缺齿鼩(Chodsigoa hypsibia)(De Winton and Styan,1899)和小纹背鼩鼱(Sorex bedfordiae)(Thomas,1911)同属于劳亚食虫目(Eulipotyphla)鼩鼱科(Soricidae)。缺齿鼩鼱属(Chodsigoa,Kast‐schenko,1907)全世界目前已知10个物种(Wilson and Mittermeier,2018;Chen et al.,2022),其中川西缺齿鼩为中国特有,其模式标本来自四川平武杨柳坝(Yang-liu-pa)(De Winton and Styan,1899),分布于我国四川、云南、西藏、甘肃、陕西、青海、河南、河北、北京和山西(Chen et al.,2017,2022)。鼩鼱属(Sorex)是鼩鼱科的模式属,全世界共有86个物种(Wilson and Mittermeier,2018),中国有18个物种(魏辅文等,2021),其中小纹背鼩鼱的模式标本来自四川峨眉山,该种主要分布于四川、云南、甘肃、陕西和西藏(Smith和解焱,2009;Chen et al.,2015)。

In September 2011,six shrew specimens were collected with traps from Mt.Liupanshan,Ningxia Hui Autonomous Region(35°36′76″N,106°32′79″E,2000 m asl).Pelage,skull,and teeth morphologies of one specimen are similar to Chodsigoa hypsibia and the others are similar to Sorex bedfordiae.Molecular analyses supported the two species C.hypsibia and S.bedfordiae to be monophyletic,and the K2P genetic distance of Cyt b gene is 0.4%(C.hypsibia)and 6.7%−7.4%(S.bedfordiae).Thus,these specimens were identified as C.hypsibia and S.bedfordiae based on morphological and phylogenetic analyses.They represent the first records of C.hypsibia and S.bedfordiae in Ningxia,and expand the known distribution range of the two species.