A prospective Revueltosaurus-eg creature is present throughout the Wolfville Formation (Carnian; Sues & Olsen, 2015 ) off Nova Scotia
six.dos.3 Most other Revueltosaurus-including taxa
Originally regarded an ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, et al. ( 2007 ) debated that NSM 004 Girl , a good posterior percentage of a left maxilla with much of a good tooth within the a keen alveolus, offers loads of reputation claims that have Roentgen. callenderi both in dental and you can maxillary morphology together with a strong ridge across the ventral margin of your antorbital fossa, the fresh new better-set up buccal emargination of one’s enamel line within the ventral take a look at, and you can a denticled enamel top without having good basal asymmetrical swelling (Irmis, Parker, ainsi que al., 2007 ). An ilium on Wolfville Formation (NSM 012 Gf ) is quite similar to that of R. callenderi when you look at the which have a keen prior process of the new iliac knife one to cannot expand anteriorly outside of the anterior the total amount of your own pubic peduncle and has now a general, circular dorsal margin towards the iliac knife. This ability and supports the clear presence of a great Revueltosaurus-such as for instance taxon in the formation (Sues & Olsen, 2015 ).
six.step three Biostratigraphic events and you may ramifications
R. callenderi only has come registered out-of several portion, the type locality about Bull Canyon Formation (Dockum Class) from east The brand new Mexico (Search, 1989 ; Seem mais aussi al., 2005 ) therefore the Chinle Creation in the Petrified Forest National Park (Padian, 1990 ; Beuhler mais aussi al., 2001 ; Parker mais aussi al., 2005 ; Atchley mais aussi al., 2013 ; Contour 1b). From the second area, ahead of interested in coupon specimens of the taxon regarding uppermost Bluish Mesa Associate and middle Sonsela Representative, Roentgen. callenderi is actually said to occur in a finite stratigraphic variety in the the reduced-middle Petrified Forest Associate (Beuhler ainsi que al., 2001 ; Look, 2001 ; Parker & ) contended you to definitely Roentgen. callenderi is away from biochronological energy. Both in the new Mexican sort of locality and Painted Wilderness localities in north PEFO, Roentgen. callenderi cooccurs to your aetosaur T. coccinarum and you may mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa that have been made use of as list taxa to the Revueltian holochronozone (Lucas & Hunt, 1993 ; ) contended that as from the PEFO Roentgen. callenderi was receive only in the a certain facies (blue paleosols) on one stratigraphic level (right above the Coated Wasteland step three Sandstone), these particular situations did not show the genuine stratigraphic directory of the fresh new taxon and you can alternatively mirrored an upkeep prejudice. Further findings regarding Roentgen. callenderi material regarding Owl Material Affiliate (Gordon ainsi que al., 2020 ; Whatley mais aussi al., 2013 ) and Sonsela Member (Atchley et al., 2013 ) helps so it theory, that the fresh specimens show that no less than in the PEFO, blackdatingforfree.com web the brand new stratigraphic range of R. callenderi extends toward underlying Adamanian holochronozone. Its lack of Roentgen. callenderi from the other penecontemporaneous internet sites regarding the American Southwestern try puzzling, such considering how numerous it’s on internet where they happens. Such as for example, the brand new vertebrate assemblage of your Petrified Forest Affiliate at the Ghost Farm into the northern This new Mexico is geographically intermediate involving the kind of locality off Roentgen. callenderi and you will PEFO, offers the newest presence a number of Revueltian index taxa (Irmis, Nesbitt, et al., 2007 ; Whiteside mais aussi al., 2015 ), and has now direct many years constraints that show it overlaps over the years with the all the way down Petrified Forest Member in the PEFO (Irmis et al., 2011 ; Rasmussen ainsi que al., 2020 ). There’s no visible taphonomic reasons why so it better-sampled and you may diverse assemblage should not preserve Revueltosaurus, since it contains sets from quick-bodied drepanosaurs to help you large-bodied phytosaurs and you will aetosaurs. Furthermore, it’s interested you to Roentgen. callenderi was not found at almost every other Bull Canyon Development internet or even in equivalent strata in the west Tx (elizabeth.grams., Lehman & Chatterjee, 2005 ; ).