diapophysis

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diapophysis

[‚dī·ə′päf·ə·səs]
(anatomy)
The articular portion of a transverse process of a vertebra.
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It has been identified as a dorsal vertebra on the basis of the position of the parapophyses and diapophyses, both of which join to form the transverse processes and are born from the neural arch (Andrews, 1913; Young et al., 2013).
The parapophyses are located entirely on the neural arch, together with the diapophyses, forming a step-like prominence on the anterior edge of the transverse process, as in other metriorhynchids (Andrews, 1913; Wilkinson et al., 2008) (Fig.
The diapophyses of the cervical vertebrae have an elliptical section.
It can be distinguished by its slightly longer diapophyses, which are dorsally placed with respect to the neural canal, or the parapophyses, which are less marked, dorsally placed and closer to the neurocentral suture (Mook, 1921; Wu et al., 1996; Nascimento and Zaher, 2010).