six.dos.step 3 Most other Revueltosaurus-including taxa
In the first place described a keen ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, mais aussi al. ( 2007 ) argued you to NSM 004 Girlfriend , a posterior part of a left maxilla that have much of a enamel inside an enthusiastic alveolus, offers a good amount of reputation states that have R. callenderi in dental care and you will maxillary morphology also a powerful ridge along side ventral margin of your antorbital fossa, the well-set up buccal emargination of tooth row into the ventral check, and you can an effective denticled tooth top devoid of a beneficial basal asymmetrical lump (Irmis, Parker, ainsi que al., 2007 ). An ilium on Wolfville Development (NSM 012 Sweetheart ) is very similar to that of Roentgen. callenderi within the with an anterior procedure for the iliac knife you to cannot expand anteriorly outside of the prior extent of your pubic peduncle and contains a general, rounded dorsal margin into iliac knife. Which ability plus aids the existence of a great Revueltosaurus-instance taxon about development (Sues & Olsen, 2015 ).
6.step three Biostratigraphic incidents and you can effects
Roentgen. callenderi has only been submitted regarding a few elements, the type area regarding Bull Canyon Formation (Dockum Classification) from east This new Mexico (Check, 1989 ; Hunt ainsi que al. https://datingranking.net/tr/daddyhunt-inceleme, 2005 ) and also the Chinle Formation from the Petrified Forest National Playground (Padian, 1990 ; Beuhler ainsi que al., 2001 ; Parker ainsi que al., 2005 ; Atchley mais aussi al., 2013 ; Shape 1b). In the second place, just before looking discount specimens of your taxon in the highest Bluish Mesa Affiliate and you can center Sonsela Member, R. callenderi is thought to take place in a finite stratigraphic variety within the the reduced-center Petrified Forest User (Beuhler ainsi que al., 2001 ; Seem, 2001 ; Parker & ) debated you to definitely R. callenderi are out-of biochronological electric. In the fresh new North american country type of area and you may Decorated Desert localities during the northern PEFO, Roentgen. callenderi cooccurs for the aetosaur T. coccinarum and mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa that have been used as list taxa on the Revueltian holochronozone (Lucas & Appear, 1993 ; ) debated you to definitely just like the from the PEFO Roentgen. callenderi are discovered merely during the a certain facies (bluish paleosols) on a single stratigraphic level (right above the Painted Wilderness step three Sandstone), these particular incidents don’t depict the true stratigraphic range of the fresh new taxon and you will alternatively reflected a maintenance prejudice. Subsequent findings out of Roentgen. callenderi matter regarding Owl Material Member (Gordon ainsi que al., 2020 ; Whatley mais aussi al., 2013 ) and Sonsela Associate (Atchley ainsi que al., 2013 ) aids so it theory, and these the fresh specimens reveal that at least from the PEFO, the newest stratigraphic variety of R. callenderi extends to your underlying Adamanian holochronozone. Its lack of Roentgen. callenderi at most other penecontemporaneous internet sites on Western Southwestern is actually puzzling, such as for instance offered exactly how numerous it’s at web sites in which it starts. Instance, the brand new vertebrate assemblage of your Petrified Forest Member at the Ghost Ranch during the north The new Mexico is geographically advanced involving the sorts of locality out-of R. callenderi and you can PEFO, shares the fresh presence several Revueltian directory taxa (Irmis, Nesbitt, et al., 2007 ; Whiteside ainsi que al., 2015 ), and has now specific ages limits that demonstrate they overlaps over time towards the lower Petrified Forest Member on PEFO (Irmis et al., 2011 ; Rasmussen mais aussi al., 2020 ). There is no visible taphonomic reason that it well-sampled and diverse assemblage should not uphold Revueltosaurus, because it contains from brief-bodied drepanosaurs so you’re able to high-bodied phytosaurs and aetosaurs. Similarly, it is interested one to Roentgen. callenderi has not been available at most other Bull Canyon Formation sites or even in equivalent strata in the west Colorado (e.grams., Lehman & Chatterjee, 2005 ; ).