The fresh centra of your posterior caudal spinal vertebrae (Figure 8n) is anteroposteriorly elongate and you will strongly amphicoelous

5.six.six Posterior caudal vertebrae

Chevron issues can be found but they are quicker line of compared to the mid-caudal vertebrae and no distinct groove into midline of ventral facial skin is obtainable. The latest transverse process was quick sideways, dorsoventrally hit bottom projections on the rear 50 % of the bottom of this new neural arc. The fresh new zygapophyses investment somewhat outside of the centrum deal with and so are small Ећimdi TД±klayД±n tab-eg processespared into early in the day spine series this new neural back was reduced to a slimmer median ridge hooking up the fresh prezygapophyses and you will postzygapophyses.

5.six.7 Ribs

Cervical and trunk ribs is actually recognized throughout the associated specimens and you may in bonebeds from the PFV 297 and you may PFV 414. A very nearly over cervical rib of PEFO 34561 is better-preserved that’s forgotten just its posterior idea in addition to tuberculum (Figure 8o). Brand new anterior means of the rib versions a rounded projection and you can tapers posteriorly in order to create a slimmer processes. Into the anterior and you may posterior evaluate, the brand new capitulum together with foot of the tuberculum is actually split of the deep grooves. When you look at the medial view, the new posterior process contours anterodorsally and you can models a good ridge you to definitely gets the capitulum. Superficial fossae are present to the each side associated with ridge. Along the latest rib was short, getting comparable duration because the length of a cervical centrum.

Numerous anterior trunk area ribs are also maintained into the PEFO 34561 (Contour 8p). Are forgotten the distal 1 / 2 of the feature. This new tuberculum are increased towards a good pedestal which is egg-shaped during the cross section and you will well separated throughout the capitulum. The brand new capitulum was increased on the an elongate pedestal which is round when you look at the cross-section and you can situated approximately 45° about tuberculum. A sharp dorsoventral ridge is obtainable distal to the convergence regarding this new capitulum and you may tuberculum towards anterior area of the rib. In-between brand new ridge as well as the axle within the medial look at was an averagely deep fossa. In posterior evaluate, there is a highly superficial fossa just distal toward convergence of the capitulum and you will tuberculum. The rest of the rib axle are convex anteriorly and you can apartment posteriorly and you will variations a medially rounded pole.

A far more rear trunk area rib (PEFO 33848) is similar besides the rib axle curves significantly more firmly medially. In addition to, new capitulum and you can tuberculum are not separated to your elongate pedestals; he could be connected by the a slimmer ridge in addition to capitulum runs much more medially as compared to tuberculum. The fresh prior ridge is actually a bit faster estimated versus a lot more anterior trunk area rib, and rear fossa just distal toward capitulum and tuberculum are some greater. The remainder rib shaft is more oval when you look at the get across area compared to significantly more anterior trunk rib. New distal avoid try somewhat longer which is concave for the distal see.

5.6.8 Gastralia

Just one gastralium is known about bonebed (PEFO 33847; Shape 8q). The fresh function possess two shafts you to form an open “V.” The fresh top of gastralium are round and does not mode a-sharp part. The latest shaft was oval when you look at the mix-section, giving the feature good flattened physical appearance. The lack of of several maintained gastralia suggests that Roentgen. callenderi got couples gastralia like other aetosaurs (age.g., Typothorax coccinarum, Heckert et al., 2010 ) instead of the greater count various other pseudosuchians (age.grams., the newest loricatan Prestosuchus chiniquensis, Desojo ainsi que al., 2020 ).

5.six.nine Chevrons

Surprisingly, zero chevrons was retrieved regarding a couple quarries. It appears a little unlikely you to R. callenderi lacked chevrons given the common thickness various other archosauromorphs, and this probably was a good taphonomic feeling considering the tail “club” molded of the osteoderms along the end (look for lower than). Additionally, new caudal backbone keeps distinctive line of chevron elements to their ventral epidermis.