The fresh new centra of rear caudal spinal vertebrae (Contour 8n) is actually anteroposteriorly elongate and you can firmly amphicoelous

5.6.six Rear caudal backbone

Chevron factors exist however they are smaller line of than in brand new mid-caudal backbone without line of groove to the midline of your ventral facial skin can be obtained. New transverse procedure is quick sideways, dorsoventrally flattened forecasts about rear half of the base of new neural arc. New zygapophyses venture some outside the centrum face and so are short tab-including processespared into the earlier vertebral series the newest neural lower back is actually faster in order to a finer average ridge hooking up new prezygapophyses and you will postzygapophyses.

5.six.7 Ribs

Cervical and you can trunk area ribs is identified throughout the relevant specimens and you will within the bonebeds in the PFV 297 and you can PFV 414. An around complete cervical rib regarding PEFO 34561 was really-maintained and is lost just their rear suggestion while the tuberculum (Figure 8o). The newest anterior means of the newest rib models a curved projection and you can tapers posteriorly to make a thinner processes. Within the anterior and you can rear examine, the newest capitulum while the base of the tuberculum is broke up because of the strong grooves. In the medial evaluate, new posterior process shape anterodorsally and you can models good ridge one becomes the fresh new capitulum. Superficial fossae can be found on the either side of ridge. The length of the brand new rib is short, are a comparable duration because the duration of a cervical centrum.

Numerous anterior trunk area ribs also are managed inside PEFO 34561 (Shape 8p). Are destroyed the fresh new distal half the brand new function. The latest tuberculum is actually elevated into the an effective pedestal that is oval inside the cross-section and you will well-separated on the capitulum. The new capitulum is actually increased for the a keen elongate pedestal that is circular inside the cross section and you will mainly based whenever forty-five° in the tuberculum. A sharp dorsoventral ridge is available distal to the overlap off brand new capitulum and tuberculum toward prior section of the rib. Around the newest ridge therefore the shaft during the medial view was a slightly deep fossa. Inside the posterior look at, there is certainly a highly superficial fossa just distal for the convergence of your capitulum and you can tuberculum. All of those other rib axle was convex anteriorly and you may flat posteriorly and you can versions a medially curved pole.

A more posterior trunk area rib (PEFO 33848) is similar besides brand new rib shaft curves significantly more highly medially. Plus, the fresh capitulum and tuberculum are not separated to the elongate pedestals; he or she is connected of the a slimmer ridge additionally the capitulum extends way more medially compared to the tuberculum. The fresh prior ridge is actually quite shorter projected as compared to a lot more prior trunk rib, as well as the rear fossa merely distal to your capitulum and tuberculum are a little higher. The rest of the rib axle is much more oval inside mix point compared to the even more anterior trunk area rib. The brand new distal prevent was some extended in fact it is concave into the distal see.

5.six.8 Gastralia

An individual gastralium is well known about bonebed (PEFO 33847; Shape 8q). The fresh new element has several shafts one to setting an unbarred “V.” The brand new apex of one’s gastralium is circular and does not function a sharp part. The brand new shaft was egg-shaped in get across-area, providing the feature an excellent flattened physical appearance. The lack of of several kept gastralia means that R. callenderi had partners gastralia like other aetosaurs (elizabeth.grams., Typothorax coccinarum, Heckert ainsi que al., 2010 ) as opposed to the better matter various other pseudosuchians (elizabeth.grams., the fresh new loricatan Prestosuchus chiniquensis, Desojo et al., 2020 ).

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5.6.9 Chevrons

Surprisingly, zero chevrons was indeed recovered regarding the a couple of quarries. It seems a little unlikely one R. callenderi lacked chevrons considering the prominent occurrence various other archosauromorphs, which means this probably try good taphonomic effect given the tail “club” designed of the osteoderms along the tail (look for below). Additionally, new caudal vertebrae has distinctive line of chevron aspects to their ventral facial skin.