The best-managed tibia is an isolated kept ability on the PFV 297 (PEFO 34273; Numbers 10l–o)

5.7.twelve Tibia

The brand new proximal head of the tibia is much longer similarly to aetosaurs; Parrish ( 1986 ) recommended your expanded tibial lead may be a beneficial synapomorphy regarding the fresh aetosaurs. Instance aetosaur tibiae, this new proximal facial skin of one’s tibia from inside the R. callenderi is actually split up by a beneficial ridge for the a couple equal measurements of quite concave medial and you will lateral condyles (Numbers 10l–o). The brand new proximal counters of medial and you will lateral condyles are concave, and a distinct lip can be acquired where in actuality the one or two condyles fulfill. New proximal head of the tibia are greatly extended mediolaterally relative toward diameter of one’s axle to your finest expansion medially (Figure 10n). The brand new axle is subrounded inside the cross section. The brand new tibia length is approximately one or two-thirds the size of the fresh new femur (Investigation S2). A straight ridge is situated into the posterolateral section of the shaft.

This new distal prevent is even mediolaterally prolonged however as strongly just like the proximal prevent and you will strongly is much like the brand new suchian standing (Profile 10o). New medial part of the articular body ideas distally that will be convex. The newest horizontal portion is actually reduced distally longer along its rear boundary and you may an excellent posterior groove divides the 2 articulation counters.

5.eight.13 Fibula

For the PEFO 34561, new fibula is quite upright (Numbers 10p–s), differing out-of compared to aetosaurians, with a noticable “kink” (e.g., Letter. engaeus; PVL 3525; L. meadei, TTM 31185-97). New proximal prevent was anteroposteriorly longer and you can circular in proximal check. The small, game iliofibularis crest is based you to-3rd the exact distance distally about lateral facial skin of your axle (Shape 10p). Its additional epidermis is smooth, barely raised above the surface of the axle differing about a lot more obvious rugose crest found in aetosaurs (Parrish, 1986 ) which is even more distally positioned. The fresh new distal avoid is mediolaterally compacted and you may expanded anteroposteriorly in line with brand new axle. Brand new distal articular facial skin was easy and you may beveled Badoo ne iЕџe yarar anteromedially such as phytosaurs (e.g., UCMP 122621).

5.eight.fourteen Astragalus

The newest astragalus (Data 11a–f) is a lot like that most other suchians (e.grams., aetosaurs). Within the prior examine, an enormous prior empty occupies most of the latest prior facial skin (Shape 11a). This new tibial and you will fibular surfaces meet during the a top in the anterior look at. Posteriorly, the brand new astragalar peg (Profile 11b) can be found to the posterodistal epidermis just ventral for the distolaterally popular rear groove. The astragalar peg keeps an effective mediolateral size from the double the fresh anteroposterior level of your feature. The fresh posterodistal surface of your peg provides a shallow section, however, it section is not shown since the a great ridge toward revealing facial skin of your own calcaneum. The fresh fibular facet of the astragalus is concave and you may subrectangular (Profile 11e). New tibial articular factors (Figure 11c) is split up into one or two concave nations having a small convex area breaking up a smaller sized lateral articular epidermis and you can a bigger medial articular skin. The bigger epidermis articulates on ventral procedure of the fresh tibia. The smaller articular body can be found to the whole dorsal surface of one’s fibular process. A thinner ridge separates the fresh new tibial and fibular points. The brand new distal roller try convex and you can is similar to those of most other suchians (see Sereno, 1991 ; Nesbitt, 2011 ).

5.eight.fifteen Calcaneum

The new calcaneum (Rates 11g–l) is similar to that of most early suchians (e.grams., aetosaurs). The fresh hemicylindrical articular epidermis are divided of the a keen anteroposteriorly trending ridge on the fibular part and astragalar element. New astragalar element is totally medial with the fibular aspect, as opposed to the condition in Age. okeeffeae (AMNH FR 30857), P. kirkpatricki (elizabeth.g., TTU-P 9002), and you may crocodylomorphs (elizabeth.g., “H. agilis” YPM 41198), where astragalar element is situated a lot more ventrally (Nesbitt, 2011 ). The brand new concave socket on astragalar peg (Contour 11h) doesn’t penetrate this new medial wall of your hemicylindrical articular surface. The fresh new calcaneal tuber are directed posteriorly this way away from quite a few of early suchians. The newest calcaneal tuber was mediolaterally stretched and you may offered dorsal and you can some in the ventral direction (Contour 11k). The new tuber doesn’t have an anteroposteriorly established groove such as P. kirkpatricki (e.grams., TTU P-9002) and you may crocodylomorphs (elizabeth.grams., “H. agilis,” YPM 41198). As an alternative, the brand new posterior facial skin was concave like in aetosaurs (elizabeth.g., Typothorax antiquum; Lucas et al., 2002 ). New ventral facial skin contains a concave fossa. The newest articulation city into distal tarsal cuatro was markedly concave and not flat such as phytosaurs or other suchians (A lot of time & Murry, 1995 ).