callenderi was well-explained (Heckert, 2002 ; Take a look, 1989 ; See & Lucas, 1994 ; Padian, 1990 ). Having multiple enamel bearing points within-situ teeth today lets a refinement from past performs. Look ( 1989 ) try best inside the recognize premaxillary white teeth off maxillary pearly whites. But really, pearly whites such as those from the premaxilla (Figures 4e, f), characterized by are shaped mesiodistally and you will lingually rounded on top, also are based in the anterior portion of the dentary. Maxillary (Data 4g, h) and you may dentary teeth (Figure 5d) for the ranking posterior towards 3rd tooth are practically shaped mesiodistally, but either is lingually curved in the top, labiolingually compressed, and just have higher lengthened crowns. The proper execution of your own maxillary and dentary teeth may vary positionally in place of an excellent discernable development, perhaps associated with tooth replacement.

One’s teeth of R

The prior deal with of your atlantal intercentrum was broken aside, however the rear half of the brand new function is actually well preserved. For the posterior look at (Figure 8c), the newest feature is actually subrectangular with limited dorsoventral constrictions across the midline. The fresh new atlantal intercentrum is actually concave dorsally where it articulates with the atlantal pleurocentrum. It articulates towards the axial pleurocentrum with an apartment saddle-molded facial skin (Contour 8d). Brand new ventral body of one’s atlantal intercentrum are excavated because of the a beneficial strong anxiety bordered by the a-sharp prior ridge. The brand new lateral surface is incised because of the an intense dorsoventrally dependent sulcus you to curves anteriorly from the their dorsal the total amount. The lateral and you may ventral despair are not found in phytosaurs (age.g., Machaeroprosopus mccauleyi, PEFO 31219), where the atlantal intercentrum are if not very similar to that of Roentgen. callenderi.

5.6.step 1 Atlas-axis cutting-edge

The brand new atlantal pleurocentrum, intercentrum, and you may neurapophysis can be found (Rates 8a–c). New prezygapophysis of one’s atlantal neurapophysis is actually a tiny anteriorly-projecting game projection (Profile 8a). In the phytosaurs (age.g., PEFO 31219) and crocodylomorphs (Brochu, 1992 ), the fresh new prezygapophysis develops significantly more sideways. The fresh postzygapophysis try enough time and you will spike-including and you may ideas posterodorsally. Stretching medially on the zygapophyses is actually a standard thin flange you to versions the fresh roof of your own neural tunnel.

The brand new atlantal pluerocentrum (Shape 8b) is actually crescentic during the anterior and you will rear views, in the place of into the phytosaurs, in which it is rectangular during the prior have a look at (elizabeth.grams., PEFO 31219). Both prior and posterior surfaces is actually convex, even though the anterior articular deal with was some compliment and you can greater than just the fresh new posterior articular face. The newest rear articular face and has a superficial dorsoventrally trending sulcus one angelreturn web to is additionally found in phytosaurs (elizabeth.grams., PEFO 31219). Brand new dorsal skin of your own atlantal pleurocentrum was concave and you can mediolaterally two times as wider due to the fact anteroposteriorly a lot of time. Proportionally, the newest atlantal pleurocentrum out of Roentgen. callenderi is actually anteroposteriorly reduced versus exact same factor in L. meadei (TMM 31185–97) and you may T. coccinarum (AMNH 7634), if you don’t he or she is comparable.

5.5 Postcrania Isolated and related postcranial issues are common from the quarries from the PFV 297 and you may PFV 414. An educated-maintained bones is that of PEFO 34561, that’ll supply the cause for the reconstruction (Profile 7) and malfunction, together with other specimens supplementing the newest description in which noted. 5.6 Axial bones

The brand new axial intercentrum is not understood regarding people specimen. This new axial pleurocentrum (Figure 8d) away from R. callenderi is approximately equant with its size. The new anterior articular face are dorsally concave where they articulates having the newest atlantal issues; ventral compared to that urban area brand new articular deal with was apartment and you can slopes posteroventrally in which it could articulate on the axial intercentrum. The new lateral corners of the prior articular face of the axial pleurocentrum is actually lengthened just like the margins abut on the parapophyses. This new parapophyses has actually flat articular surfaces, was elevated for the type of pedestals, and deal with posterolaterally. The fresh diapophyses form a curved point that faces posterolaterally and you may somewhat ventrally. The fresh lateral surface of the centrum and also a deep fossa rear for the parapophysis. Which fossa was proportionally higher compared to L. meadei (TMM 31185-97) or T. coccinarum (AMNH 7634), even though the depth of fossa alter thanks to ontogeny in other archosaurs (Irmis, 2007 ) that will be absent in some aetosaurs (Desojo ainsi que al., 2012 ). The fresh new ventral facial skin of your own axis centrum and also a sharp median ventral keel. This is certainly missing when you look at the L. meadei.