A prospective Revueltosaurus-eg creature is present on Wolfville Formation (Carnian; Sues & Olsen, 2015 ) out of Nova Scotia

6.dos.3 Most other Revueltosaurus-including taxa

In the first place known an ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, ainsi que al. ( 2007 ) debated you to NSM 004 Girlfriend , an excellent posterior part of a remaining maxilla having much of an excellent enamel within the an alveolus, offers numerous character claims having Roentgen. callenderi in dental care and you may maxillary morphology as well as a strong ridge along the ventral margin of the antorbital fossa, this new better-install buccal emargination of your tooth row from inside the ventral view, and you can a denticled tooth crown lacking a great basal asymmetrical lump (Irmis, Parker, et al., 2007 ). An ilium from the Wolfville Formation (NSM 012 Sweetheart ) is quite similar to that of R. callenderi for the with an enthusiastic prior process of the new iliac blade you to will not offer anteriorly beyond the anterior the amount of your own pubic peduncle features a general, rounded dorsal margin into the iliac blade. This feature along with helps the existence of an excellent Revueltosaurus-like taxon on creation (Sues & Olsen, 2015 ).

six.step 3 Biostratigraphic occurrences and implications

Roentgen. callenderi has only started recorded away from a couple of portion, the sort area regarding Bull Canyon Formation (Dockum Classification) from east The fresh new Mexico (Have a look, 1989 ; Appear mais aussi al., 2005 ) and Chinle Formation during the Petrified Forest Federal Playground (Padian, 1990 ; Beuhler et al., 2001 ; Parker mais aussi al., 2005 ; Atchley ainsi que al., 2013 ; Profile 1b). At latter place, in advance of finding discount specimens of the taxon on the highest Blue Mesa Associate and you may middle Sonsela Member, Roentgen. callenderi are thought to take place in a limited stratigraphic diversity inside the reduced-center Petrified Forest User (Beuhler mais aussi al., 2001 ; Take a look, 2001 ; Parker & ) contended you to definitely Roentgen. callenderi was out-of biochronological electric. In the newest Mexican kind of locality and you may Decorated Wilderness localities inside north PEFO, Roentgen. callenderi cooccurs to the aetosaur T. coccinarum and mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa which have been utilized because the list taxa into the Revueltian holochronozone (Lucas & Hunt, 1993 ; ) argued one to as the within PEFO Roentgen. callenderi are found merely when you look at the a specific facies (bluish paleosols) during the one stratigraphic peak (just over the Painted Wilderness step three Sandstone), why these occurrences didn’t show the actual stratigraphic a number of the new taxon and rather reflected a maintenance prejudice. Then findings away from R. callenderi point from the Owl Material Associate (Gordon mais aussi al., 2020 ; Whatley mais aussi al., 2013 ) and you can Sonsela Associate (Atchley mais aussi al., 2013 ) aids so it hypothesis, that this new specimens demonstrate that at the very least during the PEFO, this new stratigraphic a number of Roentgen. callenderi stretches to your hidden Adamanian holochronozone. Its lack of Roentgen. callenderi on almost every other penecontemporaneous sites throughout the Western Southwestern is puzzling, for example considering just how plentiful it’s during the internet where it starts. Including, new vertebrate assemblage of the Petrified Forest Representative at the Ghost Ranch from inside the north New Mexico was geographically intermediate between the style of locality regarding Roentgen. callenderi and you may PEFO, shares the new presence a variety of Revueltian list taxa (Irmis, Nesbitt, mais aussi al., 2007 ; Whiteside ainsi que al., 2015 ), and contains direct decades restrictions that show they overlaps as time asiandating ne demek passes with the straight down Petrified Tree Associate at PEFO (Irmis et al., 2011 ; Rasmussen mais aussi al., 2020 ). There’s absolutely no apparent taphonomic good reason why so it better-sampled and varied assemblage should not maintain Revueltosaurus, because include everything from small-bodied drepanosaurs to high-bodied phytosaurs and you can aetosaurs. Similarly, it is curious you to Roentgen. callenderi has not been bought at almost every other Bull Canyon Formation websites or even in similar strata for the west Texas (elizabeth.g., Lehman & Chatterjee, 2005 ; ).