Brand new centra of your posterior caudal vertebrae (Figure 8n) try anteroposteriorly elongate and you will highly amphicoelous

5.6.6 Rear caudal backbone

Chevron issues occur however they are shorter type of compared to the latest mid-caudal spinal vertebrae no distinctive line of groove toward midline of your ventral body is obtainable. The new transverse procedure try short sideways, dorsoventrally hit bottom forecasts regarding rear half of the base of this new sensory arch. The fresh new zygapophyses endeavor a little beyond the centrum deal with and are usually small tab-instance processespared toward past spine series brand new neural back is actually smaller to a slimmer median ridge hooking up the prezygapophyses and you will postzygapophyses.

5.6.eight Ribs

Cervical and you will trunk ribs is identified regarding associated specimens and you may inside bonebeds in the PFV 297 and you can PFV 414. An almost complete cervical rib out-of PEFO 34561 is actually better-kept and is destroyed only the posterior tip and tuberculum (Shape 8o). This new prior process of brand new rib forms a rounded projection and you may tapers posteriorly to form a finer processes. Inside the prior and posterior consider, brand new capitulum additionally the root of the tuberculum are split up because of the strong grooves. Inside the medial look at, the brand new posterior process contours anterodorsally and you will versions an effective ridge you to becomes the capitulum. Low fossae occur towards both sides from the ridge. Along this new rib was short, being about the same size as the period of a cervical centrum.

Numerous anterior trunk ribs are also maintained when you look at the PEFO 34561 (Contour 8p). Are common lost the distal half brand new function. New tuberculum is elevated to the a great pedestal which is oval for the cross section and you can well separated regarding the capitulum. This new capitulum is actually increased on the an elongate pedestal that is round in cross-section and you will founded just as much as forty-five° regarding the tuberculum. A-sharp dorsoventral ridge can be found distal on overlap regarding the fresh capitulum and you will tuberculum on the anterior side of the rib. In-between the new ridge and axle inside medial glance at try a mildly deep fossa. Inside the rear check, there is an extremely shallow fossa merely distal on the overlap of capitulum and you will tuberculum. The remainder rib shaft try convex anteriorly and flat posteriorly and forms a good medially rounded pole.

A more posterior trunk rib (PEFO 33848) is comparable besides new rib shaft contours a lot more firmly medially amino web. Also, the brand new capitulum and you will tuberculum are not separated for the elongate pedestals; he is linked because of the a finer ridge and the capitulum extends a lot more medially versus tuberculum. The newest anterior ridge try some less projected compared to a great deal more prior trunk rib, as well as the posterior fossa simply distal to your capitulum and you will tuberculum is actually somewhat greater. The rest of the rib axle is much more egg-shaped in the cross point than the alot more anterior trunk area rib. The distal avoid was a bit lengthened and is concave from inside the distal view.

5.6.8 Gastralia

A single gastralium known from the bonebed (PEFO 33847; Profile 8q). The fresh feature has one or two shafts one to means an open “V.” The top of gastralium was round and will not setting a sharp area. The shaft are oval into the cross-part, providing the ability a great flattened looks. The lack of of numerous kept gastralia shows that Roentgen. callenderi had pair gastralia like other aetosaurs (e.g., Typothorax coccinarum, Heckert mais aussi al., 2010 ) as opposed to the greater amount various other pseudosuchians (age.g., brand new loricatan Prestosuchus chiniquensis, Desojo et al., 2020 ).

5.six.9 Chevrons

Surprisingly, no chevrons was retrieved in the one or two quarries. It appears to be some unlikely that R. callenderi lacked chevrons considering their preferred thickness in other archosauromorphs, and this probably is actually a great taphonomic effect given the end “club” molded by osteoderms along side end (find below). Additionally, the new caudal vertebrae has actually line of chevron factors on their ventral body.