An educated-managed tibia was an isolated remaining element from the PFV 297 (PEFO 34273; Data 10l–o)

5.seven.a dozen Tibia

New proximal head of one’s tibia is much stretched similarly to aetosaurs; Parrish ( 1986 ) advised the lengthened tibial head is generally a beneficial synapomorphy regarding the fresh aetosaurs. For example aetosaur tibiae, brand new proximal body of your own tibia within the R. callenderi was split by the a beneficial ridge on several equivalent size of a bit concave medial and you will lateral condyles (Figures 10l–o). Brand new proximal counters of your own medial and lateral condyles is concave, and a distinct lip can be acquired where in actuality the a couple of condyles see. The brand new proximal head of the tibia try significantly expanded mediolaterally cousin towards diameter of one’s axle into the best extension medially (Profile 10n). The fresh shaft try subrounded in cross section. The new tibia length is roughly a couple-thirds the size of new femur (Study S2). A straight ridge is found towards the posterolateral side of the shaft.

The new distal stop is even mediolaterally stretched although not since the firmly just like the proximal avoid and you can highly resembles new suchian standing (Figure 10o). The fresh medial portion of the articular facial skin tactics distally and that’s convex. The horizontal bit was quicker distally longer along their rear line and you may a posterior groove splits both articulation counters.

5.7.thirteen Fibula

Within the PEFO 34561, the fresh new fibula is quite straight (Data 10p–s), differing out of regarding aetosaurians, which have a pronounced “kink” (e.g., Letter. engaeus; PVL 3525; L. meadei, TTM 31185-97). The latest proximal stop try anteroposteriorly stretched and you will rounded within the proximal consider. The little, rounded iliofibularis crest is based that-third the length distally regarding the lateral skin of one’s shaft (Contour 10p). Their exterior body are easy, hardly more than the top of shaft varying throughout the even more noticable rugose crest utilized in aetosaurs (Parrish, 1986 ) that’s a great deal more distally positioned. Brand new distal stop try mediolaterally cuddli nasД±l bir uygulama compacted and you will expanded anteroposteriorly in line with brand new shaft. Brand new distal articular body are effortless and you will beveled anteromedially such as phytosaurs (age.g., UCMP 122621).

5.seven.fourteen Astragalus

The latest astragalus (Data 11a–f) is similar to that of almost every other suchians (e.grams., aetosaurs). During the prior have a look at, a giant anterior hollow uses up a lot of the brand new anterior facial skin (Figure 11a). Brand new tibial and you will fibular surfaces see at the a peak within the anterior glance at. Posteriorly, the astragalar peg (Shape 11b) exists toward posterodistal surface merely ventral towards the distolaterally trending posterior groove. Brand new astragalar peg possess a good mediolateral size on the twice the fresh new anteroposterior level of function. This new posterodistal surface of your peg have a low division, however, so it office is not shown once the good ridge to the revealing body of the calcaneum. New fibular aspect of the astragalus are concave and subrectangular (Shape 11e). The fresh new tibial articular factors (Profile 11c) is actually put into several concave nations which have a little convex city breaking up a smaller sized horizontal articular epidermis and you may a much bigger medial articular skin. The higher surface articulates on ventral procedure of the brand new tibia. Small articular facial skin is based to the whole dorsal body of your own fibular techniques. A slimmer ridge separates the fresh new tibial and you may fibular facets. The newest distal roller is convex and you will is similar to those of most other suchians (get a hold of Sereno, 1991 ; Nesbitt, 2011 ).

5.7.fifteen Calcaneum

This new calcaneum (Figures 11g–l) is generally like most very early suchians (age.g., aetosaurs). The fresh new hemicylindrical articular facial skin is separated because of the an enthusiastic anteroposteriorly trending ridge towards fibular element and you may astragalar part. New astragalar facet is totally medial into the fibular factors, in the place of the matter for the Elizabeth. okeeffeae (AMNH FR 30857), P. kirkpatricki (e.grams., TTU-P 9002), and you may crocodylomorphs (e.grams., “H. agilis” YPM 41198), where the astragalar facet is situated way more ventrally (Nesbitt, 2011 ). This new concave retailer into astragalar peg (Contour 11h) will not penetrate the latest medial wall structure of the hemicylindrical articular facial skin. New calcaneal tuber is brought posteriorly in that way off quite a few of very early suchians. The newest calcaneal tuber try mediolaterally lengthened and you will offered dorsal and you will slightly in the ventral guidelines (Figure 11k). The newest tuber doesn’t always have an enthusiastic anteroposteriorly established groove as in P. kirkpatricki (e.grams., TTU P-9002) and crocodylomorphs (age.g., “H. agilis,” YPM 41198). As an alternative, this new rear facial skin try concave as with aetosaurs (age.grams., Typothorax antiquum; Lucas mais aussi al., 2002 ). This new ventral surface bears an excellent concave fossa. The new articulation urban area toward distal tarsal 4 is significantly concave and never flat like in phytosaurs and other suchians (Much time & Murry, 1995 ).


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