摘要
The comparative morphology of the lips and associated structures is studied among Parasinilabeo and its taxonomically related groups. On the basis of the morphological features of the lips and associated structures, Parasinilabeo is proposed to be closely associated with Pseudogyrinocheilus and Semilabeo ;and four typical mouth patterns are identifled among Parasinilabeo and its taxonomically related groups.
异华鲮属鱼类为我国特有的小型流水性鲤科鱼类，分布于长江和珠江中下游水系，具有独特的口唇及其相关结构，隶属于野鲮亚科。多样化的口唇及其相关结构是野鲮亚科与鲤科其他类群的分歧所在，也是其属级单元分类的主要依据。但是野鲮亚科鱼类口唇及其相关结构的多态现象成为其类群相关关系分析的难题。因此，异华鲮属鱼类以往被认为与不同的类群有密切的关系。本文用比较形态学方法，对异华鲮属鱼类口唇及其相关结构的特征进行了研究。结果显示：（１）异华鲮属应与唇鲮属和泉水鱼属有较密切的相关关系；（２）在异华鲮属及其分类上相关类群中可辨认出４种基本口型式样。
