Brand new proximal lead of one’s tibia is much extended much like aetosaurs; Parrish ( 1986 ) advised the extended tibial direct is a great synapomorphy out of new aetosaurs. Including aetosaur tibiae, the newest proximal body of the tibia when you look at the Roentgen. callenderi is actually split up by the a good ridge on a couple equal measurements of a bit concave medial and you may lateral condyles (Figures 10l–o). The fresh proximal surfaces of the medial and lateral condyles is concave, and a distinct lip can be acquired in which the a few condyles fulfill. The brand new proximal head of the tibia are considerably longer mediolaterally relative into diameter of axle to the better expansion medially (Shape 10n). The newest axle is subrounded within the cross section. The fresh new tibia duration is roughly several-thirds along the newest femur (Study S2). A vertical ridge is found towards posterolateral region of the axle.
Brand new distal end is additionally mediolaterally offered although not due to the fact highly given that proximal avoid and you may firmly is much like the fresh suchian reputation (Profile 10o). Brand new medial portion of the articular facial skin methods distally and that is convex. The newest lateral piece was reduced distally longer together their posterior boundary and you may a great posterior groove splits the two articulation surfaces.
When you look at the PEFO 34561, the fresh new fibula is fairly upright (Data 10p–s), differing from regarding aetosaurians, with a noticable “kink” (age.g., N. engaeus; PVL 3525; L. meadei, TTM 31185-97). The fresh proximal avoid is actually anteroposteriorly extended and circular from inside the proximal have a look at. The little, circular iliofibularis crest is located you to definitely-third the distance distally in the horizontal body of the shaft (Contour 10p). The external surface was smooth, barely greater than the surface of the shaft varying regarding the a whole lot more pronounced rugose crest utilized in aetosaurs (Parrish, 1986 ) that’s a great deal more distally positioned. New distal end try mediolaterally compacted and lengthened anteroposteriorly in line with the newest axle. New distal articular epidermis is easy and you can beveled anteromedially as with phytosaurs (elizabeth.grams., UCMP 122621).
The fresh astragalus (Rates 11a–f) is like that most other suchians (e.grams., aetosaurs). During the anterior have a look at, a large prior empty uses up most of the anterior skin (Profile 11a). The tibial and fibular counters fulfill within a top in prior have a look at. Posteriorly, the brand new astragalar peg (Shape 11b) can be found into the posterodistal skin only ventral for the distolaterally popular rear groove. New astragalar peg have a good mediolateral size throughout the double the anteroposterior level of one’s ability. The fresh posterodistal body of your peg has a superficial department, however, so it office is not shown once the an excellent ridge into articulating surface of calcaneum. The newest fibular facet of the astragalus is actually concave and subrectangular (Figure 11e). The brand new tibial articular facet (Profile 11c) try split up into several concave regions which have a small convex urban area splitting up a smaller sized lateral articular facial skin and a bigger medial articular facial skin. The higher epidermis articulates into the ventral process of this new tibia. The smaller articular facial skin is located into the entire dorsal body of fibular techniques. A thinner ridge sets apart the tibial and you may fibular aspects. Brand new distal roller are convex and is much like the ones from other suchians (pick Sereno, 1991 ; Nesbitt, 2011 ).
This new calcaneum (Data 11g–l) is generally similar to that of really very early suchians (e.grams., aetosaurs). New hemicylindrical articular body is actually split by the an enthusiastic anteroposteriorly trending ridge towards the fibular facet and you may astragalar element. The newest astragalar factors is very medial towards the fibular element, in place of the condition inside the E. okeeffeae (AMNH FR 30857), P. kirkpatricki (elizabeth.g., TTU-P 9002), and crocodylomorphs (age.grams., “H. agilis” YPM 41198), the spot where the astragalar facet can be found so much more ventrally (Nesbitt, 2011 ). amolatina beДџenenleri gГ¶rme The newest concave retailer to the astragalar peg (Profile 11h) doesn’t infiltrate the fresh medial wall structure of hemicylindrical articular epidermis. The newest calcaneal tuber is actually directed posteriorly like that out of many of very early suchians. This new calcaneal tuber is mediolaterally longer and longer dorsal and you will some in the ventral direction (Figure 11k). New tuber does not have an anteroposteriorly built groove as with P. kirkpatricki (age.g., TTU P-9002) and you can crocodylomorphs (elizabeth.g., “H. agilis,” YPM 41198). As an alternative, the latest posterior epidermis is concave like in aetosaurs (e.g., Typothorax antiquum; Lucas ainsi que al., 2002 ). The latest ventral epidermis carries good concave fossa. New articulation urban area to the distal tarsal 4 was significantly concave and never flat as in phytosaurs or other suchians (Enough time & Murry, 1995 ).