The new postfrontal are a tiny, thickened, triangular element with a good sculptured dorsal facial skin designated that have grooves and you may pits, that is usually recovered articulated for the frontal (Numbers 4i, j). Inside medial evaluate, there is a great triangular and rugose articular facial skin you to definitely articulates with this new front and parietal; it suture was upright from inside the dorsal look at. The fresh new anterolateral line inside triangular function is simple and profoundly concave since it versions area of the orbital margin and the newest associated orbital fossa towards the ventral surface. New postorbital is excluded regarding supratemporal fenestra by the junction of your parietal while the postorbital (Numbers 3a, b).
5.dos.8 Prefrontal
The latest prefrontal is designed such as the matter “7” in horizontal evaluate with a distinct rugose dorsal rim one articulates medially into the prior portion of the frontal (Shape 4l). The rear part of the ventral procedure variations the newest anterodorsal margin of one’s orbit and also a softer, posterolaterally facing, and quite concave surface building a distinct orbital fossa. The fresh new prior margin of your ventral techniques is actually rugose and you can connections new posterior part of the lacrimal. There is a definite groove to your lobby out-of a beneficial rear projection of your lacrimal ventral with the grooved dorsal rim. The fresh dorsal rim projects somewhat prior to this articulation. The newest prefrontal out-of R. callenderi does not have the brand new ventromedial procedure that gets to the latest ectopterygoid discovered into the crocodylomorphs and at the very least specific aetosaurs (elizabeth.grams., L. meadei, S. robertsoni Gower & Walker, 2002 ; Nesbitt, 2011 ).
5.dos.nine Jugal
Brand new jugal try triradiate having anterior, posterodorsal, and you may rear procedure (Data 4m, n). The latest horizontal epidermis of your own jugal try ornamented having an effective rugose development from pits and you will elongate grooves, plus the most distinct ornamentation is positioned towards main looks of jugal with the a general anteroposteriorly trending ridge. It wider ridge to your horizontal deal with is actually a continuation regarding the fresh new maxillary ridge and you may offers regarding anteriormost piece with the posterior suggestion. New anterodorsal margin is actually concave from inside the lateral check and you will versions the latest whole posteroventral edge of the fresh orbit (Contour 4n). The fresh new ventral margin was straight inside lateral view. The fresh anterior procedure and it has an effective triangular position into lateral epidermis one gets the posterior procedure for the new maxilla (see asiame nasД±l kullanД±lД±r significantly more than); this position is into wider ridge toward lateral epidermis. Dorsal towards brief slot is a little dorsolaterally facing basin that receives the ventral margin of one’s lacrimal, ergo excluding new jugal out of participation into the antorbital fenestra (Shape 4n).
New rear means of the latest jugal tapers and you can fits towards the a great position regarding the lateral skin of the quadratojugal. This new dorsal epidermis regarding the process forms new anteroventral margin of the latest horizontal temporary fenestra, as well as the rear suggestion of one’s jugal can be obtained within number of the posterior margin of one’s horizontal temporary fenestra.
Brand new posterodorsal process models the latest highest portion of the jugal having the latest tapering apex getting a bit recurved posteriorly. So it projection underlies the brand new rear an element of the margin of the postorbital; which limited convergence nearly excludes new postorbital of going into the horizontal temporal fenestra (Figure 3b). The fresh horizontal epidermis of your own posterodorsal processes carries a weak longitudinal sulcus which is almost dorsoventrally centered, that’s an extension of sulcus into horizontal facial skin of your own postorbital (Shape 3b). The fresh new prior portion of the posterodorsal process fits the fresh new ventral body of one’s postorbital, researching an enthusiastic elongate anteroventral process of the latest postorbital in the a distinct groove with the medial facial skin of the jugal. An effective ventrally projecting ridge originates from new ventral percentage of that it groove and you may suits the brand new type of posterolaterally facing pedicel that articulates having the new ectopterygoid (Profile 4n). A low dorsal fossa is dorsal with the skin off articulation to your ectopterygoid.