Morphological differences and intraspecific variations of the forefins of Mixosaurus panxianensis from the Middle Triassic of Panzhou, Guizhou
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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.
