The centra of the rear caudal backbone (Contour 8n) is anteroposteriorly elongate and you can highly amphicoelous

The centra of the rear caudal backbone (Contour 8n) is anteroposteriorly elongate and you can highly amphicoelous

5.6.6 Posterior caudal backbone

Chevron points are present but are reduced line of than in the brand new mid-caudal vertebrae without type of groove towards midline of one’s ventral facial skin exists. The latest transverse process was brief sideways, dorsoventrally hit bottom forecasts in the posterior 1 / 2 of the base of the fresh neural arch. The fresh new zygapophyses investment somewhat beyond the centrum face and therefore are quick tab-such as for instance processespared to the previous spine show new neural lower back try less in order to a thin median ridge hooking up brand new prezygapophyses and postzygapophyses. Ribs

Cervical and trunk area ribs is actually recognized regarding the related specimens and you may within the bonebeds at the PFV 297 and PFV 414. A practically complete cervical rib off PEFO 34561 is really-maintained in fact it is lost simply the posterior suggestion while the tuberculum (Shape 8o). This new prior procedure of the latest rib versions a bent projection and you will tapers posteriorly to create a thin techniques. Inside the anterior and you can posterior examine, the newest capitulum in addition to root of the tuberculum are split because of the strong grooves. Inside medial see, the new rear processes curves anterodorsally and you will forms a good ridge you to definitely gets the newest capitulum. Low fossae are present on the either side of the ridge. The size of the fresh rib is actually quick, are a comparable duration just like the period of an excellent cervical centrum.

Several anterior trunk ribs are kept from inside the PEFO 34561 (Figure 8p). Are typical forgotten the latest distal half of the latest element. The new tuberculum is actually increased on a great pedestal that’s egg-shaped within the cross section and well-separated on the capitulum. The fresh capitulum was elevated into the an enthusiastic elongate pedestal which is round during the cross section and situated everything forty-five° from the tuberculum. A sharp dorsoventral ridge is available distal to the convergence of the capitulum and you can tuberculum toward anterior area of the rib. Between the new ridge and also the shaft from inside the medial take a look at is actually a gently deep fossa. Into the rear evaluate, discover a highly low fossa only distal to the overlap of your capitulum and you can tuberculum. Other rib shaft is actually convex anteriorly and apartment posteriorly and you may versions a great medially rounded pole.

A very rear trunk area rib (PEFO 33848) is comparable besides the latest rib axle contours way more strongly medially. Together with, the fresh new capitulum and you will tuberculum commonly separated with the elongate pedestals; he could be connected because of the a slimmer ridge in addition to capitulum offers a whole lot more medially compared to tuberculum. The anterior ridge are slightly smaller projected compared to more prior trunk area rib, additionally the posterior fossa just distal into capitulum and tuberculum is slightly deeper. Other rib shaft is much more oval in get across section as compared to so much more anterior trunk area rib. This new distal stop was quite lengthened which is concave in the distal evaluate.

5.6.8 Gastralia

Just one gastralium is famous about bonebed (PEFO 33847; Profile 8q). The latest ability has one or two shafts you to definitely means an open “V.” The brand new apex of your gastralium try game and won’t form a-sharp area. The newest axle is actually oval inside the cross-area, giving the feature an effective flattened appearance. The possible lack of of numerous kept gastralia shows that Roentgen. callenderi had partners gastralia like other aetosaurs (elizabeth.g., Typothorax coccinarum, Heckert mais aussi al., 2010 ) instead of the deeper amount in other pseudosuchians (e.grams., the new loricatan Prestosuchus chiniquensis, Desojo ainsi que al., 2020 ).

5.6.nine Chevrons

Oddly, zero chevrons was basically recovered throughout the a couple quarries. It looks a little unrealistic one to Roentgen. callenderi lacked chevrons given their prominent occurrence in other archosauromorphs, so this most likely is actually a good taphonomic impact considering the end “club” designed because of the osteoderms across the tail (select less than). Additionally, the brand new caudal vertebrae have type of chevron facets on the ventral skin.