5.2.13 Squamosal
The morphology and sideways up against orientation of your own squamosal is extremely like aetosaurs instance S. robertsoni, An effective. ferratus, P. andressorum, and you will D. spurensis (Shape 4u, v; Walker, 1961 : fig. 2; Quick, 2002 : fig. 2; Schoch, 2007 : fig. 8; Schoch & Desojo, 2016 : fig. 4). The latest oddly-designed squamosal (named “sword-like” having A beneficial. ferratus from the Schoch, 2007 ) forms the fresh new posterodorsal margin of one’s supratemporal fenestra. T. ruthae comes with good sideways established squamosal; although not, Roentgen. callenderi and you may aetosaurs do not have the obvious ventral projection used in one taxon (Ezcurra ainsi que al., 2017 ).
The brand new squamosal bears three procedure, a keen anterior processes, a good posterodorsal techniques, and you can an effective posteroventral processes. Brand new mediolaterally slim anterior techniques is the prominent of your three and you will articulates ventrally with the quadratojugal, variations a little part of the posterodorsal margin of one’s horizontal temporary fenestra, and you can articulates dorsally for the posteroventral side of brand new postorbital. A horizontal ridge into dorsal portion of the squamosal bounds this new supratemporal fenestra laterally and you will continues on anteriorly onto the dorsolateral margin of postorbital. A little anteriorly leading top of anterior procedure for the latest squamosal underlies good posterodorsal projecting prong of your dorsal process of the new jugal. That it get in touch with excludes the latest postorbital of contribution from the margin away from brand new infratemporal fenestra as mentioned in earlier times, just like the condition in P. kirkpatricki (Weinbaum, 2011 ), and other about condition in aetosaurs (e.grams., P. andressorum, Schoch & Desojo, 2016 ). A little position to your anteroventral epidermis of the anterior process suits a slimmer dorsal means of the quadratojugal.
New posterior portion of the squamosal extends posterior into direct of quadrate and you can splits on a posteroventral and you can an anterodorsal process. The head of one’s quadrate matches for the a definite ventrally against fossa you to definitely offers onto the anterior an element of the posteroventral process (Figure 4v); for this reason, the fresh new posteroventral processes and also the horizontal side of the newest articulation body covers your head of the quadrate regarding lateral view. At the same time, towards the posteroventral osal, there can be a condo, posteriorly up against shelf one to accepts the thin anterodorsal margin of your own quadrate. New rear body of your posteroventral process possess a tiny element you to definitely articulates on the paroccipital means of the opisthotic (Figure 4v). In the place of extremely archosauriforms, so it element was thickened mediolaterally and you will game to your a knob equivalent for the symptom in T. dabanensis (IVPP V3237) and you will aetosaurs (Nesbitt, 2011 ). The newest posterodorsal techniques bears a good slit into the their posterior boundary that suits new posterolateral procedure for new parietal.
Among the skeleton of one’s palate, the vomers are not recognized from people known sample. Yet not, the new ectopterygoid, pterygoid, and you will palatine try preserved inside the PEFO 34561 and an extra ectopterygoid is famous (PEFO 33857); the newest palate is done however, obscured inside the PEFO 34089 (Shape three-dimensional).
5.dos.14 Pterygoid
Even though none are entirely kept (Profile 5a), the newest pterygoid include new anterior processes, horizontal processes FatFlirt kuponu, and you may rear process. Brand new prior processes is triangular in the mix-section having a taller dorsal ridge one to spells out the new ability during the the new midline. This new ventral skin of this techniques are concave. It tapers anteriorly nevertheless experience of new palatine is unknown. New lateral processes contains a posteriorly directed wing you to definitely slopes posteroventrally. The fresh new lateral part of the ventral skin and has now a giant aspect along the whole length of the brand new lateral process that articulates having the fresh dorsal body of the ectopterygoid (Shape 5a). The pterygoid body’s a thinner, vertically founded blade. Brand new ventral body bears a curved anteroposteriorly created ridge you to definitely continues on on the prior procedure. Pterygoid teeth are absent. The fresh new posterior process (= quadrate processes) is broken-in the specimens (elizabeth.grams., PEFO 34561) posterior into the articulation section into partial-game fossa towards basipterygoid procedure for the latest parabasisphenoid. The latest anteroposterior period of brand new pterygoid is a lot like one to in archosauriforms eg Erythrosuchus africanus (Gower, 2003 ) and you can P. kirkpatricki (TTU P-9000), as opposed to the anteroposteriorly abbreviated pterygoids away from aetosaurs (elizabeth.g., L. meadei, TMM 31185-98; Neoaetosauroides engaeus, PVL 5698).