callenderi had been well-revealed (Heckert, 2002 ; Search, 1989 ; Search & Lucas, 1994 ; Padian, 1990 ). Having numerous tooth bearing facets with in-situ teeth now lets a sophistication from early in the day really works. See ( 1989 ) are right into the distinguishing premaxillary white teeth from maxillary pearly whites. Yet, teeth like those on premaxilla (Rates 4e, f), described as are symmetrical mesiodistally and you can lingually curved in the top, are also found in the anterior portion of the dentary. Maxillary (Rates 4g, h) and you may dentary pearly whites (Profile 5d) in the ranks rear into the 3rd tooth are nearly shaped mesiodistally, but possibly is actually lingually rounded at the apex, labiolingually compacted, and just have large prolonged crowns. beetalk gibi uygulamalar The shape of the maxillary and dentary pearly whites varies positionally instead of a good discernable development, possibly connected with enamel replacement.
The teeth away from R
The anterior deal with of one’s atlantal intercentrum try broken out, although posterior half new element was well-preserved. Inside rear consider (Contour 8c), the newest function are subrectangular which have limited dorsoventral constrictions over the midline. The fresh new atlantal intercentrum is actually concave dorsally in which they articulates towards the atlantal pleurocentrum. It articulates on axial pleurocentrum that have a flat saddle-shaped facial skin (Figure 8d). This new ventral skin of your atlantal intercentrum was excavated by a beneficial strong despair bordered by a sharp anterior ridge. The brand new horizontal epidermis was incised by the a-deep dorsoventrally depending sulcus one to contours anteriorly on the dorsal the amount. Both horizontal and ventral anxiety aren’t found in phytosaurs (age.grams., Machaeroprosopus mccauleyi, PEFO 31219), the spot where the atlantal intercentrum try or even much like that R. callenderi.
5.six.step 1 Atlas-axis state-of-the-art
The brand new atlantal pleurocentrum, intercentrum, and you can neurapophysis exists (Rates 8a–c). The newest prezygapophysis of one’s atlantal neurapophysis is a little anteriorly-projecting game projection (Shape 8a). When you look at the phytosaurs (elizabeth.grams., PEFO 31219) and you may crocodylomorphs (Brochu, 1992 ), the latest prezygapophysis expands much more sideways. Brand new postzygapophysis are much time and you will surge-eg and you will systems posterodorsally. Extending medially regarding the zygapophyses is an over-all slim flange you to definitely variations the brand new rooftop of neural canal.
The fresh atlantal pluerocentrum (Figure 8b) are crescentic for the prior and you may rear opinions, in lieu of into the phytosaurs, in which it is square from inside the prior have a look at (elizabeth.grams., PEFO 31219). Both the prior and rear surfaces are convex, although the prior articular face try a little compliment and you may greater than the newest posterior articular face. The posterior articular deal with and contains a shallow dorsoventrally trending sulcus that is additionally found in phytosaurs (elizabeth.grams., PEFO 31219). Brand new dorsal epidermis of atlantal pleurocentrum are concave and you can mediolaterally doubly wide just like the anteroposteriorly long. Proportionally, the atlantal pleurocentrum out of R. callenderi is anteroposteriorly reduced compared to exact same factor in L. meadei (TMM 31185–97) and you can T. coccinarum (AMNH 7634), if not he or she is very similar.
5.5 Postcrania Remote and you will associated postcranial issue are throughout the quarries within PFV 297 and you may PFV 414. An educated-kept skeleton would be the fact out-of PEFO 34561, which will supply the reason behind the reconstruction (Contour eight) and you will malfunction, along with other specimens complementing the newest dysfunction where noted. 5.6 Axial bones
New axial intercentrum is not understood from one specimen. The newest axial pleurocentrum (Contour 8d) out-of R. callenderi is approximately equant in its size. The new prior articular deal with is dorsally concave where it articulates which have the fresh new atlantal facets; ventral to that city brand new articular face was apartment and you may slopes posteroventrally in which it would articulate into the axial intercentrum. The new lateral edges of prior articular deal with of your own axial pleurocentrum is offered because margins abut on parapophyses. The fresh new parapophyses features flat articular counters, was raised towards collection of pedestals, and you will deal with posterolaterally. The brand new diapophyses means a circular point you to definitely face posterolaterally and you may slightly ventrally. The brand new lateral surface of one’s centrum and also a-deep fossa posterior with the parapophysis. Which fossa is actually proportionally greater compared to L. meadei (TMM 31185-97) or T. coccinarum (AMNH 7634), although breadth of this fossa transform using ontogeny various other archosaurs (Irmis, 2007 ) which can be missing in some aetosaurs (Desojo et al., 2012 ). The ventral body of the axis centrum features a sharp average ventral keel. This is absent in the L. meadei.