Just the right distal tarsal cuatro (Numbers 11m–o) is actually maintained possesses a great posteromedial processes. The newest round proximal facial skin is somewhat concave that have a heel into this new rear section. A very clear aspect is located towards the posterolateral front side that would articulate into proximal percentage of metatarsal V. Posterior for the element to own metatarsal V try a low-articular skin with fossae and foramina. The medial side was concave and you can articulated that have metatarsal IV. Merely dorsal to this articulation good concavity is present that features fit the third tarsal. Distal tarsal 4 away from Roentgen. callenderi is far more like phytosaurs (elizabeth.grams., AMNH FR 3001) rather than paracrocodylomorphs (e.g., ‘H. agilis’, YPM 41198; Nesbitt, 2011 ).
Metatarsal I have a horizontal expansion within proximal avoid one anterodorsally overlaps metatarsal II
The fresh metatarsals (Data 11p, q), personal off metatarsal V, display the next emails: proximal and you may distal expansions, convex distal stops, strong lateral ligament pits, and strong extensor pits with the dorsal counters such as extremely archosauriforms (Nesbitt, 2011 ). Additionally, the new distal surfaces was rectangular-formed, mediolaterally large than simply dorsoventrally deep, which have a space in the center of the fresh new posterior front. Inside proximal see, metatarsal We is ellipsoid. A couple of metatarsals portray II and you will III, but as the a person is partial, it is sometimes complicated so you can assign these bones a situation. Metatarsal II and you can III are the longest, thickest at the midshaft, and also have the top distal expansion. Metatarsal IV ‘s the thinnest on midshaft and that’s brand new extremely gracile of the five metatarsals. The fresh new strongly addicted metatarsal V (Profile 11p), represented away from PEFO 34269 (kept dorsal front side-up during the an excellent stop regarding almost every other factors), bears a giant proximal surface getting articulation which have distal tarsal cuatro. The newest distal stop tapers so you’re able to a little articular epidermis getting contact to your phalanges. A lot of the newest phalanges are recognized; but not, due to disarticulation, the task in order to a little finger and also the purchase try impossible to reconstruct. It is likely your phalangeal formula is actually 2-3-4-4-?, like other very early-diverging archosaurs. Brand new asymmetrical unguals keeps concave articular elements and arch ventrally. The new ventral front side is actually flat while the unguals is triangular inside the cross-part. This morphology is a lot like compared to particular aetosaurs (elizabeth.g., Good. ferratus, SMNS 5771-S22; An effective. scagliai, PVL 2052; N https://datingranking.net/tr/adventist-singles-inceleme/. engaeus, PVL 3525), but is different from the newest mediolaterally compacted unguals out-of phytosaurs (age.g., UCMP 34239), P. chiniquensis (SNSB-BSPG XXV 11e), and you can R. tenuisceps (PVL 3827).
5.8 Osteoderms
R. callenderi and has now a complicated dermal skeleton from rectangular osteoderms which cover the newest dorsal and you may ventral surfaces of your own animal (Numbers 7b, 12h). Brand new dorsal armour includes a couple of paramedian columns away from dishes you to definitely straddle this new midline of animal just as the carapace out of of many pseudosuchians, as well as 2 articles out of related lateral osteoderms getting five dorsal osteoderms for each line such as aetosaurs (Desojo mais aussi al., 2013 ). There is absolutely no evidence one to R. callenderi had “sublateral” osteoderms like those used in An effective. geoffreyi ( ). Per row of osteoderms within the R. callenderi represents a main vertebra (Appear et al., 2005 ). The fresh new ventral armour includes at the very least five columns out of rectangular to help you rectangular (anteroposteriorly more than mediolaterally broad) osteoderms that covers the thorax and you can end. The new posteriormost osteoderms of the tail co-ossify to make a pipeline-such caudal sheath. It is not obvious if you can find gular osteoderms like in phytosaurs (e.grams., UCMP 27235). Neither is it obvious in the event the there were small appendicular osteoderms as from inside the aetosaurs (elizabeth.grams., Coahomasuchus kahleorum, NMMNHS P-18496; A. scagliai. PVL 2052) or in erpetosuchids (e.g., T. ruthae) (Ezcurra ainsi que al., 2017 ; Heckert & Lucas, 1999 ).
