six.2.step three Almost every other Revueltosaurus-instance taxa
In the first place regarded an ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, ainsi que al. ( 2007 ) argued you to definitely NSM 004 Gf , an excellent posterior part of a remaining maxilla having most of good tooth during the an alveolus, offers loads of reputation says having Roentgen. callenderi both in dental care and you can maxillary morphology and additionally a robust ridge along side ventral margin of your own antorbital fossa, the fresh new better-establish buccal emargination of your enamel row for the ventral consider, and a denticled enamel top without good basal asymmetrical swelling (Irmis, Parker, et al., 2007 ). An enthusiastic ilium regarding Wolfville Formation (NSM 012 Sweetheart ) is very like R. callenderi into the which have a keen anterior process of the new iliac blade one to cannot stretch anteriorly not in the prior the www.datingranking.net/tr/be2-inceleme/ amount of the pubic peduncle possesses a general, rounded dorsal margin towards the iliac knife. This ability including helps the clear presence of a beneficial Revueltosaurus-such as for example taxon on development (Sues & Olsen, 2015 ).
6.step three Biostratigraphic events and you may effects
R. callenderi only has started submitted away from a few portion, the sort area throughout the Bull Canyon Formation (Dockum Classification) regarding east This new Mexico (Appear, 1989 ; Seem mais aussi al., 2005 ) together with Chinle Development within Petrified Tree Federal Playground (Padian, 1990 ; Beuhler mais aussi al., 2001 ; Parker et al., 2005 ; Atchley et al., 2013 ; Profile 1b). During the latter location, just before finding coupon specimens of taxon in the uppermost Bluish Mesa Representative and you may middle Sonsela User, Roentgen. callenderi was thought to take place in a limited stratigraphic variety in the the low-center Petrified Tree Member (Beuhler et al., 2001 ; Have a look, 2001 ; Parker & ) debated you to definitely R. callenderi was out of biochronological utility. In the latest North american country types of area and Decorated Wasteland localities during the northern PEFO, Roentgen. callenderi cooccurs on the aetosaur T. coccinarum and you will mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa which have been put since index taxa for the Revueltian holochronozone (Lucas & Take a look, 1993 ; ) argued that since the on PEFO R. callenderi is receive only inside the a specific facies (bluish paleosols) at an individual stratigraphic peak (right above the Decorated Wasteland step 3 Sandstone), these events don’t depict the genuine stratigraphic variety of the new taxon and you can as an alternative shown an upkeep prejudice. Then discoveries out-of R. callenderi procedure in the Owl Rock Representative (Gordon mais aussi al., 2020 ; Whatley mais aussi al., 2013 ) and you will Sonsela Member (Atchley et al., 2013 ) helps which theory, and these the specimens demonstrate that no less than during the PEFO, the fresh stratigraphic selection of R. callenderi offers towards underlying Adamanian holochronozone. The absence of Roentgen. callenderi from the most other penecontemporaneous internet on Western Southwestern try puzzling, such as for instance offered how plentiful it’s within internet in which they does occur. Including, the new vertebrate assemblage of Petrified Tree User on Ghost Farm for the north The brand new Mexico try geographically advanced between your style of locality regarding Roentgen. callenderi and PEFO, shares the fresh new presence some Revueltian list taxa (Irmis, Nesbitt, et al., 2007 ; Whiteside et al., 2015 ), and contains particular decades constraints that demonstrate they overlaps over time toward all the way down Petrified Tree Member within PEFO (Irmis ainsi que al., 2011 ; Rasmussen mais aussi al., 2020 ). There isn’t any visible taphonomic reason why which well-sampled and you can diverse assemblage cannot keep Revueltosaurus, because it contains anything from quick-bodied drepanosaurs so you can large-bodied phytosaurs and you will aetosaurs. Also, it is interested one to R. callenderi was not found at almost every other Bull Canyon Development web sites or even in similar strata during the western Colorado (age.grams., Lehman & Chatterjee, 2005 ; ).