5.6.six Rear caudal vertebrae
Chevron elements exists but they are quicker line of compared to the latest mid-caudal spinal vertebrae with no line of groove toward midline of your own ventral skin exists. The fresh new transverse procedure is short sideways, dorsoventrally hit bottom projections throughout the rear 1 / 2 of the base of the fresh neural arch. The fresh new zygapophyses opportunity slightly outside the centrum face as they are brief tab-instance processespared into earlier vertebral show the fresh neural spine are faster so you can a thinner average ridge linking the fresh new prezygapophyses and you will postzygapophyses.
Cervical and you may trunk ribs is actually known regarding related specimens and you may into the bonebeds in the PFV 297 and you can PFV 414. A very nearly over cervical rib of PEFO 34561 try better-managed which will be destroyed just its posterior suggestion in https://datingranking.net/tr/edarling-inceleme addition to tuberculum (Shape 8o). Brand new anterior procedure for the brand new rib variations a circular projection and you can tapers posteriorly to create a thinner processes. For the prior and you can posterior consider, new capitulum and the base of the tuberculum is broke up of the strong grooves. Inside the medial examine, new posterior process curves anterodorsally and you can models a good ridge you to gets the brand new capitulum. Shallow fossae can be found to the each side associated with ridge. The size of the brand new rib is actually quick, getting a comparable size since the period of a cervical centrum.
Multiple anterior trunk ribs are also preserved inside the PEFO 34561 (Shape 8p). All are destroyed the fresh distal half of the fresh new feature. The brand new tuberculum is increased towards an excellent pedestal which is oval into the cross-section and you will well-separated regarding capitulum. Brand new capitulum try elevated toward an elongate pedestal which is game in cross section and oriented whenever forty-five° regarding the tuberculum. A-sharp dorsoventral ridge can be found distal into the overlap from the fresh new capitulum and you can tuberculum towards the anterior region of the rib. Around the newest ridge and axle inside medial check are an averagely strong fossa. When you look at the rear examine, there clearly was a highly low fossa simply distal to the convergence of capitulum and you will tuberculum. All of those other rib shaft was convex anteriorly and apartment posteriorly and variations an excellent medially rounded rod.
A far more posterior trunk rib (PEFO 33848) is comparable other than the latest rib axle shape a lot more firmly medially. Along with, brand new capitulum and you will tuberculum aren’t split on the elongate pedestals; he’s linked from the a slimmer ridge and capitulum stretches much more medially as compared to tuberculum. The brand new prior ridge is actually somewhat reduced projected compared to a lot more prior trunk rib, therefore the rear fossa merely distal to your capitulum and you can tuberculum is actually a little better. Other rib axle is more oval in get across section versus a great deal more anterior trunk area rib. The latest distal avoid was a bit expanded and is concave inside the distal view.
A single gastralium known from the bonebed (PEFO 33847; Contour 8q). The fresh ability has actually a couple shafts that mode an open “V.” The brand new apex of gastralium was game and does not form a sharp point. The fresh shaft was oval for the cross-part, giving the element a beneficial flattened appearance. The lack of of several managed gastralia signifies that R. callenderi had couple gastralia like other aetosaurs (elizabeth.g., Typothorax coccinarum, Heckert ainsi que al., 2010 ) rather than the greater matter in other pseudosuchians (age.g., the newest loricatan Prestosuchus chiniquensis, Desojo mais aussi al., 2020 ).
Oddly, no chevrons have been recovered in the a few quarries. It appears to be a bit unrealistic you to definitely R. callenderi lacked chevrons given its popular occurrence in other archosauromorphs, so this most likely was good taphonomic feeling because of the tail “club” formed from the osteoderms along side end (look for below). Furthermore, the fresh new caudal vertebrae provides collection of chevron issue on their ventral facial skin.