callenderi was basically better-described (Heckert, 2002 ; See, 1989 ; Look & arkadaЕџlД±k deДџerler eДџitimi Lucas, 1994 ; Padian, 1990 ). Having multiple tooth hit aspects within-situ teeth today lets a sophistication out-of prior works. Take a look ( 1989 ) try correct inside identifying premaxillary teeth from maxillary pearly whites. Yet, teeth such as those throughout the premaxilla (Data 4e, f), characterized by being symmetrical mesiodistally and you may lingually rounded in the apex, also are found in the prior part of the dentary. Maxillary (Data 4g, h) and dentary white teeth (Shape 5d) in the positions posterior on third tooth are almost symmetrical mesiodistally, however, possibly try lingually curved during the top, labiolingually compacted, while having high extended crowns. The proper execution of one’s maxillary and dentary pearly whites varies positionally as opposed to an effective discernable trend, perhaps regarding enamel replacement.

Tooth out of R

The brand new anterior deal with of the atlantal intercentrum try broken aside, but the rear 1 / 2 of the newest ability are well-preserved. Inside the posterior consider (Profile 8c), the fresh new feature is actually subrectangular that have limited dorsoventral constrictions across the midline. The atlantal intercentrum is concave dorsally in which it articulates towards the atlantal pleurocentrum. It articulates with the axial pleurocentrum with an apartment saddle-molded facial skin (Figure 8d). The new ventral body of your atlantal intercentrum was excavated by the a good deep depression bordered from the a sharp anterior ridge. This new lateral body is actually incised because of the a-deep dorsoventrally based sulcus that contours anteriorly from the their dorsal the quantity. Both the horizontal and you can ventral despair are not included in phytosaurs (e.g., Machaeroprosopus mccauleyi, PEFO 31219), the spot where the atlantal intercentrum is actually otherwise very similar to regarding R. callenderi.

5.6.step 1 Atlas-axis advanced

The fresh atlantal pleurocentrum, intercentrum, and you can neurapophysis are present (Figures 8a–c). The latest prezygapophysis of the atlantal neurapophysis are a small anteriorly-projecting round projection (Shape 8a). In phytosaurs (e.g., PEFO 31219) and you may crocodylomorphs (Brochu, 1992 ), the brand new prezygapophysis develops far more laterally. The fresh new postzygapophysis was long and you can increase-such and you may systems posterodorsally. Stretching medially on zygapophyses try a broad slim flange one models the roof of one’s neural canal.

New atlantal pluerocentrum (Shape 8b) try crescentic for the anterior and you may rear views, as opposed to into the phytosaurs, where it is square for the prior consider (elizabeth.g., PEFO 31219). The anterior and you will rear counters is convex, although the prior articular face was a bit compliment and you may large than just the latest posterior articular face. The latest posterior articular deal with features a superficial dorsoventrally trending sulcus one is also utilized in phytosaurs (age.grams., PEFO 31219). The fresh dorsal skin of your own atlantal pleurocentrum is actually concave and you may mediolaterally two times as large while the anteroposteriorly a lot of time. Proportionally, brand new atlantal pleurocentrum away from R. callenderi try anteroposteriorly smaller versus same aspect in L. meadei (TMM 31185–97) and you can T. coccinarum (AMNH 7634), or even he could be much the same.

5.5 Postcrania Separated and you will associated postcranial aspects are throughout the quarries at PFV 297 and you can PFV 414. An informed-preserved bones is that out-of PEFO 34561, that’ll supply the reason behind the newest reconstruction (Profile seven) and you will breakdown, along with other specimens supplementing the malfunction in which noted. 5.6 Axial skeleton

The fresh new axial intercentrum is not known off people sample. The brand new axial pleurocentrum (Contour 8d) from Roentgen. callenderi is approximately equant in its proportions. The fresh new prior articular deal with try dorsally concave where they articulates having the fresh atlantal factors; ventral to that town the articular face was flat and you may slopes posteroventrally where it could articulate to the axial intercentrum. The new lateral sides of the anterior articular deal with of your axial pleurocentrum is actually prolonged given that margins abut toward parapophyses. The parapophyses provides flat articular surfaces, are elevated towards the line of pedestals, and you can face posterolaterally. New diapophyses setting a rounded point that face posterolaterally and you may some ventrally. The fresh new lateral body of your own centrum and has an intense fossa posterior into parapophysis. That it fossa is actually proportionally higher compared to L. meadei (TMM 31185-97) otherwise T. coccinarum (AMNH 7634), though the breadth associated with the fossa transform using ontogeny various other archosaurs (Irmis, 2007 ) which is missing in some aetosaurs (Desojo ainsi que al., 2012 ). The new ventral body of axis centrum and contains a-sharp average ventral keel. It is absent inside the L. meadei.