New paper out, er, yesterday: Atterholt, J., Wedel, M.J., Tykoski, R., Fiorillo, A.R., Holwerda, F., Nalley, T.K., Lepore, T., and Yasmer, J. 2024. Neural canal ridges: a novel osteological correlate of postcranial neuroanatomy in dinosaurs. The Anatomical Record, 1-20. https://doi.org/10.1002/ar.25558 This one started a bit over 10 years ago, on April 9, 2014.

Western University of Health Sciences

Matt Wedel

Bony spinal cord supports (arrows) in caudal vertebrae of several specimens of
<em>
 Camarasaurus
</em>
. (a) Right lateral view of neural canal with broken vertebral arch, clearly exposing a bony spinal cord support (MWC 5496). (b) Anterolateral oblique view of the neural canal of the third caudal vertebra (SUSA 515) with a broken vertebral arch displaying a bony spinal cord support.

New paper: Atterholt et al. (2024) on neural canal ridges in dinosaurs

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image-title="Pneumatic Allosaurus cervical" image-description=""
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Spotted this beauty in the collections at Dinosaur Journey this past
summer. With the front end of the centrum blown off, taphonomy once
again proves to be the poor man's CT machine, giving us a great look at
the pneumatic spaces inside the vertebra.

**EDIT, Oct. 13, 2019** --- WHOOPS! That ain't a cervical. Based on the
plates in Madsen (1976), it's a dead ringer for the second dorsal
vertebra.

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![Allosaurus fragilis cervicodorsal transition - Madsen 1976 plates
14-16](https://svpow.files.wordpress.com/2019/10/allosaurus-fragilis-cervicodorsal-transition-madsen-1976-plates-14-16.jpg?w=1024&h=651){.wp-image-16698
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image-title="Allosaurus fragilis cervicodorsal transition – Madsen 1976 plates 14-16"
image-description=""
image-caption="<p>Vertebrae C7 through D3 in Allosaurus fragilis, from plates 14-16 in Madsen (1976). Abbreviations: dp, diapophysis; li, interspinous ligament scar; nc, neural canal; ns, neural spine; pp, parapophysis; pr, prezygapophysis.</p>
"
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Vertebrae C7 through D3 of *Allosaurus fragilis* in anterior view, from
plates 14-16 in Madsen (1976). Abbreviations: dp, diapophysis; li,
interspinous ligament scar; nc, neural canal; ns, neural spine; pp,
parapophysis; pr, prezygapophysis.
:::

## Reference

Madsen, Jr., J.H. 1976. *Allosaurus fragilis*: a revised osteology. Utah
Geological and Mining Survey Bulletin 109: 1-163.


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Messages de Rogue Scholar

New paper: Atterholt et al. (2024) on neural canal ridges in dinosaurs

A nice pneumatic Allosaurus cervical dorsal