6.2.step 3 Almost every other Revueltosaurus-such taxa
To begin with regarded an enthusiastic ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, mais aussi al. ( 2007 ) debated one to NSM 004 Sweetheart , a rear part of a remaining maxilla with most of an effective enamel into the an enthusiastic alveolus, offers a number of reputation states with R. callenderi both in dental care and maxillary morphology together with a robust ridge across the ventral margin of one’s antorbital fossa, the latest better-set up buccal emargination of the enamel line inside the ventral have a look at, and you may a denticled tooth top lacking an effective basal asymmetrical lump (Irmis, Parker, ainsi que al., 2007 ). An enthusiastic ilium regarding the Wolfville Development (NSM 012 Girl ) is quite like R. callenderi for the with an anterior procedure of the iliac blade that cannot extend anteriorly not in the anterior the quantity of your own pubic peduncle and has an over-all, round dorsal margin towards iliac blade. It element including aids the presence of good Revueltosaurus-including taxon about development (Sues & Olsen, 2015 ).
6.step three Biostratigraphic incidents and you may ramifications
R. callenderi has only come registered away from a few components, the sort area regarding Bull Canyon Development (Dockum Group) off eastern The newest Mexico (Search, 1989 ; Appear et al., 2005 ) in addition to Chinle Creation within Petrified Forest National Playground (Padian, 1990 ; Beuhler ainsi que al., 2001 ; Parker mais aussi al., 2005 ; Atchley mais aussi al., 2013 ; Contour 1b). During the second place, prior to looking for voucher specimens of your taxon on the highest Bluish Mesa Affiliate and you can middle Sonsela Representative, Roentgen. callenderi is actually believed to occur in a finite stratigraphic range into the the lower-center Petrified Tree Associate (Beuhler ainsi que al., 2001 ; Take a look, 2001 ; Parker & ) contended one R. callenderi was regarding biochronological electric. In the newest North american country form of locality and Painted Wasteland localities within https://datingranking.net/tr/afroromance-inceleme/ the northern PEFO, Roentgen. callenderi cooccurs towards aetosaur T. coccinarum and you may mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa that have been used as list taxa towards Revueltian holochronozone (Lucas & Hunt, 1993 ; ) contended you to while the in the PEFO R. callenderi was located merely in a particular facies (blue paleosols) on an individual stratigraphic level (just above the Coated Desert step three Sandstone), that these events failed to show the genuine stratigraphic variety of the new taxon and you can as an alternative shown a maintenance bias. Further discoveries off Roentgen. callenderi topic throughout the Owl Rock User (Gordon mais aussi al., 2020 ; Whatley et al., 2013 ) and you may Sonsela Representative (Atchley mais aussi al., 2013 ) supports this hypothesis, and they the latest specimens reveal that no less than on PEFO, the fresh stratigraphic directory of Roentgen. callenderi runs on underlying Adamanian holochronozone. The absence of R. callenderi within most other penecontemporaneous websites throughout the American Southwest is puzzling, for example given exactly how plentiful it’s from the internet sites in which it occurs. For example, new vertebrate assemblage of your own Petrified Forest Associate from the Ghost Farm when you look at the north The latest Mexico are geographically intermediate within sort of area out-of Roentgen. callenderi and PEFO, shares the newest exposure numerous Revueltian list taxa (Irmis, Nesbitt, ainsi que al., 2007 ; Whiteside ainsi que al., 2015 ), and also right years limitations that demonstrate they overlaps eventually into the straight down Petrified Forest Representative on PEFO (Irmis mais aussi al., 2011 ; Rasmussen mais aussi al., 2020 ). There is absolutely no obvious taphonomic good reason why that it well-sampled and you can diverse assemblage shouldn’t preserve Revueltosaurus, because it consists of anything from quick-bodied drepanosaurs so you can higher-bodied phytosaurs and you may aetosaurs. Likewise, it is curious one to Roentgen. callenderi has not been bought at most other Bull Canyon Creation sites or perhaps in comparable strata into the west Texas (e.g., Lehman & Chatterjee, 2005 ; ).
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