The fresh morphology and sideways against positioning of the squamosal is extremely like aetosaurs such as S. robertsoni, A beneficial. ferratus, P. andressorum, and D. spurensis (Figure 4u, v; Walker, 1961 : fig. 2; Quick, 2002 : fig. 2; Schoch, 2007 : fig. 8; Schoch & Desojo, 2016 : fig. 4). The fresh new strangely-shaped squamosal (referred to as “sword-like” to possess A great. ferratus because of the Schoch, 2007 ) variations the posterodorsal margin of the supratemporal fenestra. T. ruthae is served by an effective laterally built squamosal; but not, Roentgen. callenderi and you will aetosaurs do not have the pronounced ventral projection included in one taxon (Ezcurra mais aussi al., 2017 ).
New squamosal contains about three process, a keen anterior processes, good posterodorsal techniques, and an excellent posteroventral processes. The fresh new mediolaterally slim prior process ‘s the largest of one’s about three and you may articulates ventrally to your quadratojugal, variations a tiny portion of the posterodorsal margin of horizontal temporal fenestra, and you may articulates dorsally to your posteroventral side of this new postorbital. A lateral ridge to the dorsal portion of the squamosal bounds new supratemporal fenestra sideways and you will goes on anteriorly on the dorsolateral margin of the postorbital amino eЕџleЕџme olmuyor. A tiny anteriorly leading apex of one’s prior process of the fresh squamosal underlies a beneficial posterodorsal projecting prong of one’s dorsal means of the jugal. Which get in touch with excludes brand new postorbital away from contribution about margin off the fresh infratemporal fenestra as mentioned prior to now, just like the condition in P. kirkpatricki (Weinbaum, 2011 ), and differing throughout the symptom in aetosaurs (elizabeth.g., P. andressorum, Schoch & Desojo, 2016 ). A tiny position into anteroventral skin of one’s prior procedure fits a finer dorsal means of the latest quadratojugal.
New posterior portion of the squamosal stretches rear towards the direct of the quadrate and you can divides towards the a good posteroventral and you may an anterodorsal procedure. The head of your quadrate fits on the a definite ventrally against fossa one extends on the anterior a portion of the posteroventral processes (Profile 4v); for this reason, the latest posteroventral process while the lateral edge of the latest articulation surface covers the head of the quadrate out-of horizontal take a look at. As well, on the posteroventral osal, there is a flat, posteriorly against bookshelf you to welcomes the newest slim anterodorsal margin of your quadrate. The new rear skin of one’s posteroventral procedure has actually a small facet one to articulates into paroccipital means of the new opisthotic (Profile 4v). In lieu of extremely archosauriforms, that it factors is actually thickened mediolaterally and you will round on the a manhood similar to your symptom in T. dabanensis (IVPP V3237) and aetosaurs (Nesbitt, 2011 ). The latest posterodorsal processes contains an excellent slit on their posterior edge you to definitely fits the latest posterolateral procedure of the newest parietal.
Among bones of your own palate, the fresh new vomers commonly acknowledged from any known specimen. But not, the brand new ectopterygoid, pterygoid, and you may palatine was preserved from inside the PEFO 34561 and you will an extra ectopterygoid is well known (PEFO 33857); the fresh new palate is done however, obscured into the PEFO 34089 (Shape three-dimensional).
No matter if nothing are completely preserved (Contour 5a), the new pterygoid contains the fresh new anterior procedure, horizontal techniques, and you may posterior procedure. The fresh new anterior process is actually triangular for the get across-part that have a tall dorsal ridge one delineates the element at the new midline. The newest ventral facial skin regarding the procedure are concave. They tapers anteriorly nevertheless the experience of the brand new palatine are unknown. The brand new lateral processes contains a great posteriorly indicated wing that mountains posteroventrally. The latest horizontal part of the ventral epidermis and has a large element along side entire period of the brand new horizontal procedure that articulates which have the new dorsal facial skin of ectopterygoid (Profile 5a). The fresh new pterygoid body’s a thin, vertically oriented blade. This new ventral skin contains a bent anteroposteriorly based ridge one continues on the prior techniques. Pterygoid pearly whites try absent. The newest rear procedure (= quadrate procedure) is broken-in all specimens (age.g., PEFO 34561) posterior towards articulation point towards the partial-circular fossa into the basipterygoid procedure of brand new parabasisphenoid. The latest anteroposterior duration of the pterygoid is a lot like one to in archosauriforms eg Erythrosuchus africanus (Gower, 2003 ) and you will P. kirkpatricki (TTU P-9000), instead of the anteroposteriorly abbreviated pterygoids from aetosaurs (elizabeth.grams., L. meadei, TMM 31185-98; Neoaetosauroides engaeus, PVL 5698).