One another PEFO 34561 and PEFO 34269 keep limited 2nd sacral backbone

One another PEFO 34561 and PEFO 34269 keep limited 2nd sacral backbone

5.6.cuatro Sacral spinal vertebrae

Multiple remote sacral centra was in fact gathered (elizabeth.grams., PEFO 33875 and 33819), however the sacral rib and sensory arc was damaged off. The amount of sacral backbone is set is one or two created on: (a) a couple of distinct sacral rib marks to your ilia of R. callenderi; (b) two ankylosed centra (PEFO 36876) that have obvious articulations to have ribs and you may sensory arches (Data 8i–k); and you will (c) there be seemingly merely a couple of morphologies out-of sacral vertebrae one of this new remote specimens. The two ankylosed centra demonstrates that certain specimens of R. callenderi may coossify the sacral spinal vertebrae and that which reputation is varying for the taxon. Because every specimens from PFV 297 try out-of equivalent proportions, it coossification in some specimens doesn’t appear to be dimensions relevant. Rather, since the into the ventral view the horizontal expansions of centra to brand new ankylosed urban area are not well symmetrical, it combo you certainly will depict a beneficial cystic and additional specimens are required to confirm this.

The sacral centra are elongate and you may mediolaterally broad than dorsoventrally extreme, and the centrum confronts was amphicoelous (Numbers 8i–k). Next sacral rib articulates with most of the lateral surface of one’s centrum and you will the main ventrolateral facial skin of the sensory arc (PEFO 36876). In dorsal take a look at, this new sacral rib of your second sacral vertebra increases greatly to the a keen anteroposteriorly elongate articulation towards the ilium (Figure 8l). For the horizontal consider, which articulation epidermis was cigar-shaped; which articulates with a lot of of one’s period of the fresh new postacetabular procedure of your ilium. Read more