Karstsinnectes cehengensis(Cypriniformes:Nemacheilidae),a new species of cave fish from Guizhou,China  

作　　者：Xinrui Zhao Changting Lan Tao Luo Jing Yu Jiajun Zhou Ning Xiao Jiang Zhou 

机构地区：[1]School of Karst Sciences,Guizhou Normal University,Guiyang 550025,China [2]School of Life Sciences,Guizhou Normal University,Guiyang 550001,China [3]Zhejiang Forest Resource Monitoring Center,Hangzhou 310020,China [4]Zhejiang Forestry Survey Planning and Design Company Limited,Hangzhou 310020,China [5]Guiyang Healthcare Vocational University,Guiyang 550081,China

出　　处：《Zoological Systematics》2024年第2期101-115,共15页动物分类学报（英文版）

基　　金：supported by the Guizhou Province Top Discipline Construction Program Project(QianjiaoKeyan Fa[2019]125);the Guizhou Normal University Academic Emerging Talent Fund Project(Qianshi Xin Miao[2021]20);the Postgraduate Education Innovation Programme of Guizhou Province(Qianjiaohe YJSKYJJ[2021]091)。

摘　　要：Four species of the genus Karstsinnectes,which live in dark,low-energy groundwater ecosystems,are currently recorded,mainly distributed in the upstream of the Pearl River,the Youjiang River and the Hongshui River.Completing biodiversity surveys is particularly difficult due to the particular cave habitats inhabited by these species.In this work,we describe a new cave fish of the genus Karstsinnectes,namely K.cehengensis Luo,Zhao&Zhou,sp.nov.,collected from the Beipanjiang River,the upstream of the Hongshui River.Genetically,the four individuals of the new species form a phylogenetically separate lineage,as the sister clade of K.acridorsalis,with a 9.4–9.5%genetic difference in mitochondrial Cyt b.Morphologically,the new species can be distinguished from its congeners by a combination of the following morphological characteristics:body naked,without body color;eyes reduced,diameter 1.4–3.8%of head length;anterior and posterior nostrils adjacent,anterior nostril not elongated to a barbel-like tip;lateral line incomplete;caudal fin forked;dorsal-fin rays iii-7,pectoral-fin rays i-11–12,pelvic-fin rays i-7,anal-fin rays iii-5,with 14 branched caudal-fin rays.The discovery of this new species represents the northernmost distribution of species within the genus Karstsinnectes and the first record from Guizhou Province.All currently known species of this genus inhabited in caves,making them ideal organisms for studying historical river connectivity and cave formation process.

关 键 词：DIVERSITY karst cave MORPHOLOGY PHYLOGENY Karstsinnectes 

分 类 号：Q959.4[生物学—动物学]