基于几何形态学的三种库蠓翅的形态变化分析
Geometric morphometric analysis of wing shape variation among three important species of the genus Culicoides (Diptera: Ceratopogonidae)
常琼琼** 蒋晓红 侯晓晖***
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DOI：10.7679/j.issn.2095-1353.2018.039
作者单位：遵义医学院，基础医学院，遵义 563000
中文关键词：库蠓属，近似种，翅，几何形态学，形态变化
英文关键词：Culicoides, similar species, wing, geometric morphometric, morphologic variation
中文摘要：
【目的】 基于几何形态学方法定量分析库蠓亚属中3个近似种（刺螫库蠓Culicoides punctatus、灰黑库蠓Culicoides pulicaris和新替库蠓Culicoides newsteadi）翅的形态变化规律，以期进行准确鉴定。【方法】 运用几何形态学标点（Landmark）对3种库蠓的翅进行量化分析，并结合主成分分析法（Principal component analysis, PCA）、典型变量分析法（Canonical variate analysis, CVA）、薄片样条（Thin-plate spline, TPS）及聚类分析法对3种库蠓翅进行分析比较，探讨其形态变异。【结果】 3种库蠓的翅在翅型、翅脉结构上存在着显著差异，主要发生在径中横脉、径室区，以及翅基部和端部。【结论】 几何形态学能够作为一种工具对蠓科昆虫进行种间关系及分类研究。
英文摘要：
[Objectives] To assess geometric morphometric analysis of wing shape as a means of accurately identifying three biting midges of the genus Culicoides Latreille, C. punctatus, C. pulicaris and C. newsteadi. [Methods] Various geometric methods were used to analyze wing shape variation, including landmarks, principal component analysis, canonical variate analysis, thin-plate splines and cluster analysis. [Results] Significant differences in wing shape and venation were apparent among the three species, the main differences were in the radio-median cross-vein, radial cell, and basal and distal portions of the wing. C. punctatus and C. newsteadi were most similar in wing shape and venation. [Conclusion] Geometric morphometrics is a useful tool for identifying interspecific relationships within the Ceratopogonidae.