【摘要】 混鱼龙科除Mixosaurus cornalianus之外的其他属种由于化石材料稀少、保存破碎,此前对其形态解剖学特征,特别是前肢形态结构特征及其生长发育过程和种内差异认识存在局限。经对发掘自贵州省盘州市(原为盘县)新民乡及邻区多件不同大小的Mixosaurus panxianensis标本前肢进行观察对比和定量研究,发现其尺骨、桡腕骨、指骨以及豌豆骨显示了一定的随生长发育而发生的特征变化。此外,桡骨前缘凹口和中间腕骨近端凹口的发育状态在M. cornalianus及M. panxianensis中均存在种内变异。更多还原

【Abstract】 The anatomy of the forefins of Mixosauridae, including ontogenetic and intraspecific variations, remains poorly known due to the lack of well-preserved materials except for Mixosaurus cornalianus. Several specimens of Mixosaurus panxianensis in different sizes excavated from Panzhou City, Guizhou Province were studied. The result shows some ontogenetic variations in their ulnae, radialia, phalanges and pisiforms. Moreover, the development of the notches on the anterior margin of radius and the proximal margin of intermedium is variable within individuals of Mixosaurus panxianensis.更多还原