It foramen opens posteriorly since the evidenced from the a properly-outlined, posteriorly widening channel

A tiny foramen is available only ventral to the posterior avoid of one’s dorsolateral ridge, toward posterolateral surface of the surangular. The fresh foramen seats anteromedially through the surangular to leave within the deep fossa toward anterior region of the medially projecting process. The fresh medial expression of foramen was bigger than the lateral phrase as in E. okeeffeae, S. inexpectatus, aetosaurs (e.g., L. meadei and you will D. spurensis), Euparkeria capensis, H. ischigualastensis, P. kirkpatricki, and you can Crocodylomorpha (Gower & Weber, 1998 ; Nesbitt, 2007 , 2011 ; Short, 2002 ; Weinbaum, 2011 ).

Various other foramen can be found anterodorsal with the that only revealed towards this new posterolateral surface of surangular, as dabble isim deДџiЕџtirme well as underneath the dorsolateral ridge, but anterior towards the glenoid. Into medial surface of one’s surangular, the new possible log off for it foramen takes place in some other anteriorly facing concavity simply prior with the high foramen towards anterior front of the medial projection; these medial foramina is actually separated because of the a little crest. New medial surface of surangular was concave anterior these types of foramina.

Brand new angular at least contacted the new posterior an element of the ventral side of brand new surangular that will have called all ventral boundary and you will partially overlapped the fresh new ventral prior projection of surangular. The tiny additional mandibular fenestra exists within central and ventral prior projections of the surangular, towards the main projection of dentary forming this new anterodorsal border, together with angular forming the fresh new ventral edging.

5.3.step three Angular

The fresh sturdy angular versions the posteroventral portion of the hemimandible. The newest medially stretched ventral edge possess a facet to your prearticular towards prior part (Figure 5f). The brand new rear a portion of the dorsal margin possess a thinner tongue from limbs that fits towards a slot towards the ventral margin of your own surangular. Including the surangular, the fresh horizontal surface carries a rugose trend. Anteriorly, the new horizontal skin of one’s surangular enjoys a good triangular position one welcomes the newest ventral posterior process of the fresh dentary along the ventral margin of your own jaw.

5.step three.cuatro Splenial

This new mediolaterally narrow splenial (Shape 5g) covers the complete Meckelian groove of one’s dentary. This new tapered anterior portion doesn’t participate in brand new mandibular symphysis (Figure 3d) whilst really does in a few aetosaurs (age.grams., P. andressorum, Schoch & Desojo, 2016 ). The brand new ventral margin provides a good hit bottom articular facial skin for the ventral margin of your dentary. An identical body with the dorsal margin articulates toward dentary just above the Meckelian groove and you can ventral towards the bookshelf which includes the new tooth line.

5.3.5 Articular

The latest articular (Profile 5h–j) is the most are not retrieved remote cranial element in this new Revueltosaurus Quarry (PFV 297). Into the articulation into the surangular, this new glenoid surface is actually created anteromedially/posterolaterally. The newest medial area of the glenoid is actually some concave to match the massive medial condyle of your quadrate, and horizontal area of the glenoid was convex to suit brand new concavity within condyles towards quadrate. The brand new prior edge of the glenoid isn’t line of having said that for the rear border, which has an incredibly sharp and you may popular rim. Brand new anteriormost area of the horizontal surface of your own articular holds a distinct fossa, which gets the medial procedure for the latest surangular (discover less than).

Rear on the rear boundary of one’s glenoid on the dorsal body of the retroarticular procedure, there was an enthusiastic arcuate, laterally tapered, and you will profoundly concave fossa (Figure 5i). The horizontal and you may medial ends up of the fossa lay dorsal to help you dorsoventrally thickened edges one overhang the newest medial and lateral edges from the brand new articular. The fresh new horizontal one of these overlaps the latest dorsal side of the newest surangular. The fresh new medial part of the arcuate fossa contains a definite foramen one pierces this new articular, leaving anteroventrally out of the medial wall on the anterior side of new medial edge. Which foramen tends to be homologous which have a similar ability in rauisuchids, phytosaurs (Nesbitt, 2011 ), or any other archosauriforms (Sookias ainsi que al., 2020 ). Posterior to your arcuate fossa, you will find a prominent mediolaterally compacted crest at rear stop of one’s retroarticular processes. This new ventral surface associated with the crest is actually confluent which have a noticable average ridge that offers across the ventral body of your articular.