The fresh new centra of your own posterior caudal vertebrae (Shape 8n) try anteroposteriorly elongate and you may highly amphicoelous

5.six.six Posterior caudal backbone

Chevron issue occur however they are shorter distinct than in the fresh new mid-caudal vertebrae with no distinctive line of groove into midline of the ventral surface is present. The new transverse procedure are small sideways, dorsoventrally hit bottom forecasts on posterior 1 / 2 of the base of new sensory arch. New zygapophyses enterprise some outside of the centrum face and are also short tab-particularly processespared to your prior spine series new neural lower back are less in order to a thin median ridge hooking up the brand new prezygapophyses and you can postzygapophyses.

5.six.eight Ribs

Cervical and trunk area ribs is actually identified in the relevant specimens and inside bonebeds from the PFV 297 and you will PFV 414. An around over cervical rib off PEFO 34561 try really-preserved and is lost merely their rear suggestion in addition to tuberculum (Profile 8o). The fresh prior means of brand new rib variations a circular projection and you may tapers posteriorly to create a thinner procedure. Within the prior and rear consider, this new capitulum therefore the root of the tuberculum try split because of the strong grooves. Inside the medial view, the rear processes curves anterodorsally and versions an effective ridge one to will get brand new capitulum. Superficial fossae can be found on the both sides with the ridge. The size of new rib try small, becoming about the same length just like the amount of a beneficial cervical centrum.

Numerous prior trunk area ribs are maintained in the PEFO 34561 (Figure 8p). Are common missing the new distal 1 / 2 of new element. This new tuberculum was raised wikipedia referansД± with the an effective pedestal which is egg-shaped when you look at the cross section and you may well separated throughout the capitulum. The capitulum was increased towards the an elongate pedestal that is rounded inside cross-section and you can centered everything forty-five° regarding tuberculum. A-sharp dorsoventral ridge exists distal with the convergence regarding the new capitulum and tuberculum to the prior side of the rib. Around this new ridge and shaft in the medial look at is actually a mildly strong fossa. Within the posterior view, there can be an extremely superficial fossa merely distal for the overlap of your own capitulum and you will tuberculum. All of those other rib shaft is convex anteriorly and you can flat posteriorly and you may variations good medially curved pole.

A very rear trunk area rib (PEFO 33848) is comparable besides the newest rib axle curves a lot more highly medially. And additionally, the brand new capitulum and tuberculum aren’t broke up into elongate pedestals; he is connected because of the a finer ridge and the capitulum expands a lot more medially compared to the tuberculum. This new prior ridge try a little less projected versus way more anterior trunk area rib, as well as the rear fossa merely distal to the capitulum and you will tuberculum is a little higher. The rest of the rib shaft is much more oval into the mix section compared to the a whole lot more prior trunk rib. The latest distal prevent is actually somewhat expanded that is concave inside distal check.

5.six.8 Gastralia

Just one gastralium known from the bonebed (PEFO 33847; Profile 8q). Brand new feature has a couple of shafts one to mode an unbarred “V.” The new apex of your own gastralium try circular and does not function a sharp point. The newest axle are oval within the mix-point, giving the feature good flattened appearance. The possible lack of of numerous managed gastralia implies that Roentgen. callenderi had pair gastralia like other aetosaurs (elizabeth.g., Typothorax coccinarum, Heckert et al., 2010 ) rather than the greater number in other pseudosuchians (e.grams., the brand new loricatan Prestosuchus chiniquensis, Desojo ainsi que al., 2020 ).

5.six.9 Chevrons

Surprisingly, zero chevrons was retrieved in the a couple quarries. It looks a little unrealistic one to Roentgen. callenderi lacked chevrons given their preferred occurrence in other archosauromorphs, which means this most likely is actually a beneficial taphonomic effect because of the end “club” molded by the osteoderms along the end (see less than). In addition, brand new caudal backbone has distinctive line of chevron points on the ventral skin.