six.2.step 3 Most other Revueltosaurus-such as for example taxa
To start with regarded an enthusiastic ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, mais aussi al. ( 2007 ) argued one NSM 004 Girl , a beneficial posterior portion of a remaining maxilla having the majority of an excellent tooth from inside the an enthusiastic alveolus, shares loads of profile claims with Roentgen. callenderi in both dental and you can maxillary morphology in addition to a strong ridge across the ventral margin of the antorbital fossa, this new well-set-up buccal emargination of the tooth line inside ventral look at, and a good denticled enamel top lacking an effective basal asymmetrical lump (Irmis, Parker, ainsi que al., 2007 ). An enthusiastic ilium about Wolfville Formation (NSM 012 Girlfriend ) is very similar to that of Roentgen. callenderi within the having a keen prior procedure for the fresh new iliac knife one to does not stretch anteriorly not in the prior the total amount of the pubic peduncle and contains an over-all, rounded dorsal margin towards iliac knife. So it function in addition to supports the presence of a good Revueltosaurus-such as for example taxon on the development (Sues & Olsen, 2015 ).
6.step 3 Biostratigraphic occurrences and you will ramifications
R. callenderi only has become recorded out-of a couple components, the sort area regarding the Bull Canyon Formation (Dockum Group) from eastern The latest Mexico (Search, 1989 ; Check mais aussi al., 2005 ) while the Chinle Development on Petrified Forest National Playground (Padian, 1990 ; Beuhler et al., 2001 ; Parker mais aussi al., 2005 ; Atchley mais aussi al., 2013 ; Profile 1b). From the second venue, in advance of searching for coupon specimens of one’s taxon on the uppermost Blue Mesa User and you will center Sonsela Representative, Roentgen. callenderi was considered occur in a finite stratigraphic diversity for the the lower-center Petrified Forest User (Beuhler ainsi que al., 2001 ; Hunt, 2001 ; Parker & ) debated one Roentgen. callenderi are from biochronological energy. In both the latest North american country style of locality and you may Coated Wasteland localities during the northern PEFO, R. callenderi cooccurs with the aetosaur T. coccinarum and you can mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa which were utilized just like the directory taxa towards the Revueltian holochronozone (Lucas & Take a look, 1993 ; ) debated one to given that at the PEFO R. callenderi is actually found simply from inside the a particular facies (blue paleosols) at the an individual stratigraphic top (just over the Decorated Wilderness 3 Sandstone), these situations failed to show the actual stratigraphic list of the taxon and instead mirrored a preservation bias. After that findings regarding Roentgen. callenderi situation on the Owl Rock Representative (Gordon mais aussi al., 2020 ; Whatley et al., 2013 ) and you can Sonsela Member (Atchley et al., 2013 ) aids this hypothesis, that the new specimens show that at least during the PEFO, brand new stratigraphic variety of R. callenderi stretches into hidden Adamanian holochronozone. The absence of R. callenderi in the most other penecontemporaneous web sites regarding American Southwest are puzzling, christianmingle promosyon kodu Гјcretsiz including offered exactly how numerous it’s from the websites where it takes place. Eg, brand new vertebrate assemblage of your Petrified Forest Associate at the Ghost Ranch from inside the northern New Mexico is actually geographically intermediate amongst the method of locality out-of R. callenderi and you will PEFO, shares new presence many different Revueltian directory taxa (Irmis, Nesbitt, et al., 2007 ; Whiteside ainsi que al., 2015 ), and also direct many years restrictions that show they overlaps with time towards the all the way down Petrified Forest User during the PEFO (Irmis ainsi que al., 2011 ; Rasmussen ainsi que al., 2020 ). There’s absolutely no apparent taphonomic reasons why so it well-tested and varied assemblage should not uphold Revueltosaurus, as it include anything from small-bodied drepanosaurs in order to highest-bodied phytosaurs and you may aetosaurs. Likewise, it is curious one R. callenderi hasn’t been bought at most other Bull Canyon Formation internet sites or perhaps in equivalent strata within the west Tx (age.grams., Lehman & Chatterjee, 2005 ; ).