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Left ilium and isolated sacral processes.
The axial skeleton of the holotype (AODF 603) is known from isolated dorsal ribs, isolated gastralia and two isolated sacral processes.
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It exhibits notable saurischian characters as well, such as the long mid-cervical ribs that are subparallel to the neck, a hyposphene-hypantrum articulation in the dorsal vertebrae, enlarged sacral transverse processes, a broad supraacetabular crest, and a medial lamina of the ischium restricted to the proximal one-third of the bone.
We therefore used the sacral transverse process elements of the lateral masses as CRD landmarks.
In the outlet views, cephalad residual displacement (CRD) was recorded by measuring the difference in height between the top lateral prominences of the 2 sacral transverse process elements (Standring et al. 2008).
The morphology of the transverse processes and sacral ribs also indicates that the internal sacral elements are the primordial sacrals.
This morphology is absent in the transverse process and sacral rib of the anteriormost and posteriormost sacral vertebrae.
The spinous processes of all sacral vertebrae have massive bases.
Transverse processes of the sacral vertebrae with camellate pneumatic cavities.
Although some regions are broken, there are no evident sutural marks between the transverse processes and the sacral ribs.
Between the fused transverse processes of the lower sacral vertebrae, on each side, are a series of four openings (sacral foramina); the sacral nerves and blood vessels pass through these openings.
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