摘要
对中国岭鳅属圆尾群现有3个种及采自广西环江毛南县关安村的岭鳅标本进行外部形态比较,结果表明,采自关安的岭鳅标本与无眼岭鳅在形态上有明显的差异,它与多斑岭鳅和平头岭鳅也存在一定的差异,但缺少过硬的划分指标。鉴于此,该文运用多变量形态度量学分析了关安的岭鳅标本与多斑岭鳅和平头岭鳅的形态差异,共测量了63尾标本的26个框架结构特征和20个常规特征。主成分分析结果显示,它们分别在散点图上占据明显不相重叠的区域。此结果提示,采自关安的岭鳅标本很有可能是一个隐含的岭鳅新种,但为了最终确定其分类地位,仍需解剖学和分子生物学方面的证据支持。
Morphological characteristics were compared between three recorded species of rounded caudal fin Oreonectes and specimens collected from Guan＇an of Guangxi.The results showed the Oreonectes sp.from Guan＇an was distinguished from O.anphthalmus.Although some morphologic differentiations existed among Oreonectes sp.,O.polystigmus,and O.platycephalus,their differentiations were not enough to distinguish between them.Consequently,we used multivariate morphometrics to determine their morphologic differentiation.Twenty-six frame characteristics and 20 general characteristics of 63 specimens were measured.The results of the Principal Component Analysis showed that Oreonectes sp.and O.polystigmus,and Oreonectes sp.and O.platycephalus occupied obviously different areas in the scatter plot.It is suggested that the specimens collected from Guan＇an may be a cryptic new species of Oreonectes.However,its taxonomic status should be decided by evidence from anatomical and molecular biological studies.
基金
云南省重点学科野生动植物保护与利用项目(XKZ200904)资助
关键词
岭鳅
形态差异
形态度量学
Oreonectes
morphologic differentiations
methods of multivariate morphometrics
