中国北鳅属新纪录种及北鳅属鱼类系统发育关系  

A novel record species of the genus Lefua from China and phylogenetic relationships of the genus Lefua

作　　者：王敏[1,2] 谭慧敏[1,2] 杨银盆 陈咏霞 WANG Min;TAN HuiMin;YANG YinPen;CHEN YongXia(School of Life Sciences,Hebei University Baoding 071002,China;Institute of Life Sciences and Green Development,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学生命科学学院,保定071002 [2]河北大学生命科学与绿色发展研究院,保定071002

出　　处：《中国科学：生命科学》2021年第9期1319-1327,共9页Scientia Sinica(Vitae)

基　　金：河北省自然科学基金(批准号:C2016201055);白洋淀水生生物资源调查及水域生态修复示范项目(批准号:2130135)资助。

摘　　要：本研究基于形态学鉴别特征和线粒体d-loop序列描记了采自吉林省延边图们江水系的中国新记录种--史氏北鳅(Lefua pleskei,Herzenstein,1888),并对北鳅属鱼类的系统发育关系进行了分析.史氏北鳅区别于其他同源物种的鉴别特征为:体纤细,成熟雄鱼体侧有明显纵条纹,雌鱼尾鳍基部有圆形黑斑,背鳍位置靠后(背鳍前长为体长的64.33%),眼间距窄(眼间距为头长的32.06%),上唇薄、光滑,下唇薄、中央无乳突.基于最大似然法(maximum likelihood,ML)和贝叶斯法(Bayesian inference,BI)构建的系统发育树显示,史氏北鳅与短体北鳅(L.nikkonis,Jordan&Fowler,1903)构成姐妹群,然后再与北鳅(L.costata,Kessler,1876)聚为一支,系统发育关系反映了北鳅属鱼类地理关系的远近.Lefua pleskei(Herzenstein,1888),a novel record species of the genus Lefua,collected from the Tumen River,Yanbian Korean Autonomous Prefecture,Jilin Province,China,was described based on morphology and mitochondrial d-loop sequence analyses.Meanwhile,phylogenetic relationships of Lefua species were researched.Lefua pleskei is distinguished from its congeners by the following characters:slender body shape,presence of a black longitudinal stripe on both body sides in mature males;the presence of circular-dark blotches on the middle of the caudal fin base in mature females;dorsal fin located much farther posteriad(the anterior length of the dorsal fin was 64.33%of the body length);narrow interorbital(interorbital width was 32.06%of the head length);eyes located dorsolaterally on the head;thin and smooth upper lip;thin lower lip,inconspicuous mastoid in the middle of the lower lip.The phylogenetic relationship constructed based on the maximum likelihood and Bayesian methods showed that L.pleskei(Kessler,1876)and L.nikkonis(Jordan&Fowler,1903)formed a sister group and a relationship with L.costata,indicating that the phylogenetic relationship is partially congruent with geographical patterns.

关 键 词：史氏北鳅 新记录 形态特征 d-loop序列 系统发育关系 

分 类 号：Q958[生物学—动物学]