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The vertebral column of ''Corosaurus'' consists of 18 [[Cervical vertebrae|cervical]] (neck), 23 [[Dorsal vertebrae|dorsal]] (trunk), 3 [[Sacral vertebrae|sacral]] (hip), and likely about 40 caudal (tail) vertebrae, for a total of around at least 85.<ref name="S91" />{{Rp|20–23}} The largest neck vertebrae are those closest to the trunk, with size decreasing towards the skull. The [[Vertebral centrum|vertebral bodies]] in the neck are about as tall as they are long. The second neck vertebra has a small triangular [[neural spine]], while those of the other neck vertebrae are quadrangular. The [[cervical rib]]s each articulate with the vertebral bodies with two articular surfaces. The tips of the cervical ribs bear two prongs, one pointing forwards and the other pointing backwards.<ref name="S91" />{{Rp|20–21}} While fairly similar to those in the neck, the trunk vertebrae are larger than those in the other regions. The trunk vertebrae have robust sideways extensions known as transverse processes, about as long as the quadrangular neural spines are tall. The trunk vertebrae also posses an extra set of articulations, formed by protuberances and sockets known as [[Zygosphene-zygantrum articulation|zygosphenes and zygantra]]. The long, curved, unthickened [[rib]]s in the trunk have only one surface for articulation with the vertebrae.<ref name="S91" />{{Rp|21–22}}
The hip vertebrae resemble the trunk vertebrae and fit together firmly. In some individuals they are unfused, in others, there may be a limited amount of fusion. The sacral ribs, which articulate with the [[pelvis]], are long and extend outwards and downwards.<ref name="S91" />{{Rp|22–23}}
==References==
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