A prospective Revueltosaurus-such creature can be acquired on Wolfville Formation (Carnian; Sues & Olsen, 2015 ) of Nova Scotia

13 août 2022by muhammad

A prospective Revueltosaurus-such creature can be acquired on Wolfville Formation (Carnian; Sues & Olsen, 2015 ) of Nova Scotia

six.2.step three Almost every other Revueltosaurus-such as for example taxa

Originally labeled an enthusiastic ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, ainsi que al. ( 2007 ) debated one to NSM 004 Sweetheart , a beneficial rear part of a left maxilla which have a lot of a enamel into the an enthusiastic alveolus, offers a good amount of profile claims which have Roentgen. callenderi both in dental and you will maxillary morphology as well as an effective ridge over the ventral margin of your own antorbital fossa, the newest well-arranged buccal emargination of one’s enamel line within the ventral glance at, and you will an effective denticled enamel top devoid of a good basal asymmetrical swelling (Irmis, Parker, mais aussi al., 2007 ). A keen ilium bbpeoplemeet nasД±l Г§alД±ЕџД±r? in the Wolfville Development (NSM 012 Gf ) is extremely like Roentgen. callenderi into the that have an anterior process of this new iliac knife one to doesn’t offer anteriorly outside of the anterior the quantity of your own pubic peduncle features a broad, game dorsal margin towards iliac knife. It ability as well as aids the clear presence of a Revueltosaurus-such as for instance taxon on formation (Sues & Olsen, 2015 ).

six.step 3 Biostratigraphic events and you can ramifications

R. callenderi only has already been filed off a couple portion, the sort locality regarding the Bull Canyon Creation (Dockum Classification) regarding east The new Mexico (Search, 1989 ; See mais aussi al., 2005 ) as well as the Chinle Creation during the Petrified Tree National Park (Padian, 1990 ; Beuhler et al., 2001 ; Parker ainsi que al., 2005 ; Atchley mais aussi al., 2013 ; Shape 1b). From the second location, before finding discount specimens of your taxon regarding best Blue Mesa Member and you will middle Sonsela Representative, Roentgen. callenderi are said to take place in a restricted stratigraphic variety in the reduced-middle Petrified Forest Affiliate (Beuhler mais aussi al., 2001 ; Take a look, 2001 ; Parker & ) argued you to definitely R. callenderi was out-of biochronological electricity. In both the latest North american country type locality and you may Coated Desert localities during the north PEFO, R. callenderi cooccurs into the aetosaur T. coccinarum and mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa which were used due to the fact index taxa for the Revueltian holochronozone (Lucas & Seem, 1993 ; ) argued that because from the PEFO R. callenderi are discovered simply inside the a certain facies (blue paleosols) at an individual stratigraphic peak (just over the Coated Wilderness step 3 Sandstone), these situations didn’t show the true stratigraphic listing of the fresh taxon and instead mirrored a preservation bias. Then discoveries out-of R. callenderi material on Owl Material Member (Gordon et al., 2020 ; Whatley mais aussi al., 2013 ) and you may Sonsela Member (Atchley mais aussi al., 2013 ) supports it theory, and they the new specimens demonstrate that at the very least at the PEFO, the latest stratigraphic range of R. callenderi stretches on the hidden Adamanian holochronozone. Its lack of Roentgen. callenderi during the other penecontemporaneous internet sites on Western Southwest was puzzling, instance given just how abundant it’s within internet in which it does occur. For example, brand new vertebrate assemblage of Petrified Tree Member at the Ghost Farm inside the north The Mexico try geographically advanced between the style of area off R. callenderi and you may PEFO, shares brand new presence many different Revueltian list taxa (Irmis, Nesbitt, et al., 2007 ; Whiteside et al., 2015 ), possesses specific age constraints that show they overlaps over time to your lower Petrified Forest Member in the PEFO (Irmis mais aussi al., 2011 ; Rasmussen mais aussi al., 2020 ). There isn’t any apparent taphonomic reasons why which really-sampled and you can diverse assemblage should not keep Revueltosaurus, since it consists of from brief-bodied drepanosaurs so you can large-bodied phytosaurs and you can aetosaurs. Similarly, it is interested one Roentgen. callenderi hasn’t been bought at other Bull Canyon Formation web sites or in similar strata for the western Tx (elizabeth.g., Lehman & Chatterjee, 2005 ; ).