Internal morphological structures of Cixiidae mouthparts are described and compared in various representatives of the Cixiidae and several other representatives of hemipterans. The morphological study shows that the mouthpart structures have not evolved uniformly and reveals the great disparity of these structures. Particularly, the connecting system of the mouthparts, localisation of salivary canal and shape of the mandibular and maxillar stylets provide together a new set of 17 new characters. A parsimonious analysis to evaluate the phylogenetic interest carried by these 17 selected characters shows that mouthpart structures have not evolved anarchically, but that they indeed carry some phylogenetic information that will be useful to be included in further morphological phylogenetic analysis.

中文翻译：

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飞虱一组新的形态特征所携带的系统发育信息：慈溪虫科模型的内部口器结构和测试（半翅目：Fulgoromorpha）


描述并比较了慈溪科不同代表和半翅目其他代表的慈溪口器的内部形态结构。形态学研究表明，口器结构演化并不统一，结构差异巨大。特别是，口器的连接系统、唾液管的定位以及下颌和上颌管心针的形状共同提供了一组 17 个新角色。评估这 17 个选定性状所具有的系统发育兴趣的简约分析表明，口器结构并未无序地进化，但它们确实携带了一些系统发育信息，这些信息将有助于纳入进一步的形态系统发育分析。