callenderi was basically really-described (Heckert, 2002 ; Search, 1989 ; See & Lucas, 1994 ; Padian, 1990 ). That have numerous enamel affect facets within-situ white teeth now allows a sophistication away from early in the day works. Check ( 1989 ) was correct for the differentiating premaxillary teeth from maxillary teeth. But really, teeth like those about premaxilla (Figures 4e, f), characterized by getting symmetrical mesiodistally and you may lingually rounded at apex, are based in the anterior part of the dentary. Maxillary (Numbers 4g, h) and you can dentary teeth (Contour 5d) from inside the positions rear towards the third tooth are almost shaped mesiodistally, but either is actually lingually rounded at the top, labiolingually compressed, and also highest prolonged crowns. The design of one’s maxillary and dentary pearly whites may differ positionally as opposed to good discernable trend, maybe pertaining to enamel replacement.
The teeth away from R
The fresh prior face of your atlantal intercentrum are busted out, nevertheless the rear half the latest feature is actually well preserved. When you look at the rear view (Figure 8c), brand new feature are subrectangular that have slight dorsoventral constrictions over the midline. The fresh new atlantal intercentrum is actually concave dorsally where they articulates for the atlantal pleurocentrum. They articulates toward axial pleurocentrum with a flat saddle-formed facial skin (Figure 8d). The ventral skin of atlantal intercentrum is actually excavated by a beneficial strong despair bordered by the a sharp prior ridge. The fresh horizontal body is actually incised because of the a deep dorsoventrally centered sulcus you to definitely shape anteriorly during the their dorsal the quantity. Both the horizontal and you will ventral anxiety aren’t included in phytosaurs (e.g., Machaeroprosopus mccauleyi, PEFO 31219), where in actuality the atlantal intercentrum was or even much like that R. callenderi.
5.six.1 Atlas-axis advanced
This new atlantal pleurocentrum, intercentrum, and you can neurapophysis can be found (Numbers 8a–c). The latest prezygapophysis of the atlantal neurapophysis is actually a little anteriorly-projecting circular projection (Profile 8a). In phytosaurs (age.g., PEFO 31219) and you may crocodylomorphs (Brochu, 1992 ), the new prezygapophysis grows way more laterally filipino cupid eЕџleЕџme olmuyor. This new postzygapophysis try much time and you will surge-such as for instance and you can tactics posterodorsally. Stretching medially on zygapophyses is actually a standard narrow flange you to definitely variations the newest roof of the neural tunnel.
The latest atlantal pluerocentrum (Shape 8b) is crescentic for the anterior and you will rear opinions, unlike during the phytosaurs, where it’s square during the anterior have a look at (age.g., PEFO 31219). Both the prior and rear counters try convex, though the prior articular face is actually slightly flatter and you may greater than the newest posterior articular deal with. The fresh new rear articular face and contains a shallow dorsoventrally popular sulcus one to is additionally utilized in phytosaurs (e.grams., PEFO 31219). This new dorsal surface of your atlantal pleurocentrum is actually concave and you may mediolaterally twice as large since anteroposteriorly a lot of time. Proportionally, brand new atlantal pleurocentrum of R. callenderi try anteroposteriorly shorter compared to the exact same element in L. meadei (TMM 31185–97) and you may T. coccinarum (AMNH 7634), otherwise he’s quite similar.
5.5 Postcrania Separated and you may relevant postcranial issues all are throughout the quarries from the PFV 297 and PFV 414. An informed-maintained skeleton is the fact off PEFO 34561, that can deliver the reason behind new reconstruction (Figure eight) and you may breakdown, along with other specimens complementing the brand new description where indexed. 5.6 Axial bones
The newest axial intercentrum is not identified away from one sample. The new axial pleurocentrum (Contour 8d) regarding R. callenderi is approximately equant in proportions. New anterior articular face was dorsally concave in which it articulates that have new atlantal issues; ventral to that town brand new articular face is flat and you can slopes posteroventrally in which it could articulate into axial intercentrum. The newest horizontal edges of the anterior articular face of the axial pleurocentrum is actually offered because margins abut on the parapophyses. The latest parapophyses provides apartment articular surfaces, are increased to the distinctive line of pedestals, and you will face posterolaterally. The newest diapophyses form a rounded section you to definitely faces posterolaterally and you may a bit ventrally. The latest horizontal epidermis of your own centrum and also an intense fossa rear towards the parapophysis. Which fossa try proportionally greater compared to L. meadei (TMM 31185-97) otherwise T. coccinarum (AMNH 7634), even though the breadth on the fossa changes through ontogeny various other archosaurs (Irmis, 2007 ) and that is absent in a few aetosaurs (Desojo ainsi que al., 2012 ). New ventral body of your own axis centrum and has a sharp average ventral keel. This really is missing within the L. meadei.
