File:Holotype vertebra of Xenoposeidon proneneukos, in left anteroventrolateral view.png
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[edit]DescriptionHolotype vertebra of Xenoposeidon proneneukos, in left anteroventrolateral view.png |
English: NHMUK R2095, the holotype and only vertebra of Xenoposeidon proneneukos, in left anteroventrolateral view, highlighting the three sets of laminae related to the prezygapophyses.
The trajectories of the medial CPRLs (which emerge from the neural arch pedicels) and the lateral CPRLs (which intersect with the APCLs) indicate the approximate position of the prezygapophyses. The additional arched laminae form the margins of the large, teardrop-shaped anterior fossa, homologous with a CPRF, but meet at a position some way below and posterior to the presumed location of the prezygapophyseal facets. Breakage of both medial CPRLs and the left ACPL and PCDL is indicated by cross-hatching. Note that, from this perspective, the lateral CPRL appears to turn a corner where it intersects with the ACPL, such that the posteroventral portion of the lateral CPRL appears contiguous with the dorsal portion of the ACPL. This is an illusion brought about by the eminence at the point of intersection. As always, this is much easier to see in three dimensions (see S1). |
Date | |
Source | Taylor MP. (2018) Xenoposeidon is the earliest known rebbachisaurid sauropod dinosaur. PeerJ 6:e5212 https://doi.org/10.7717/peerj.5212 [1] |
Author | Mike Taylor |
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current | 02:19, 9 September 2018 | 1,461 × 2,539 (4 MB) | Levi bernardo (talk | contribs) | User created page with UploadWizard |
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