six.dos.step 3 Other www.datingranking.net/tr/blackfling-inceleme/ Revueltosaurus-including taxa
In the first place regarded an ornithischian dinosaur (Galton, 1983 ), Irmis, Parker, mais aussi al. ( 2007 ) argued you to definitely NSM 004 Gf , good posterior portion of a left maxilla which have much of an effective tooth from inside the an alveolus, offers numerous character states having Roentgen. callenderi both in dental care and maxillary morphology in addition to a robust ridge over the ventral margin of your antorbital fossa, the brand new really-establish buccal emargination of your tooth row inside the ventral evaluate, and you will a beneficial denticled tooth crown without having a beneficial basal asymmetrical swelling (Irmis, Parker, et al., 2007 ). An enthusiastic ilium from the Wolfville Development (NSM 012 Girlfriend ) is very like R. callenderi when you look at the with a keen prior procedure for this new iliac blade one cannot extend anteriorly outside of the anterior the total amount of your pubic peduncle and also a broad, game dorsal margin with the iliac blade. It ability and supports the existence of a beneficial Revueltosaurus-instance taxon on development (Sues & Olsen, 2015 ).
6.step 3 Biostratigraphic occurrences and you can ramifications
Roentgen. callenderi only has become filed of several parts, the kind locality on Bull Canyon Formation (Dockum Classification) regarding east The brand new Mexico (See, 1989 ; See ainsi que al., 2005 ) while the Chinle Formation in the Petrified Tree National Park (Padian, 1990 ; Beuhler ainsi que al., 2001 ; Parker et al., 2005 ; Atchley ainsi que al., 2013 ; Shape 1b). At second place, ahead of looking for voucher specimens of taxon about best Bluish Mesa Representative and you may center Sonsela Member, Roentgen. callenderi try considered take place in a limited stratigraphic diversity for the the reduced-middle Petrified Forest User (Beuhler ainsi que al., 2001 ; Hunt, 2001 ; Parker & ) argued one to Roentgen. callenderi is actually away from biochronological utility. In both the fresh new North american country type of area and you may Decorated Wasteland localities within the northern PEFO, R. callenderi cooccurs to your aetosaur T. coccinarum and mystriosuchine (= pseudopalatine) leptosuchomorph phytosaurs, taxa which have been used just like the index taxa with the Revueltian holochronozone (Lucas & Have a look, 1993 ; ) debated one to since on PEFO R. callenderi was located just in the a specific facies (blue paleosols) from the a single stratigraphic height (just over the Coated Wilderness step 3 Sandstone), these occurrences did not depict the actual stratigraphic directory of the fresh new taxon and you can alternatively mirrored a preservation prejudice. Subsequent breakthroughs away from R. callenderi issue regarding the Owl Rock Representative (Gordon et al., 2020 ; Whatley et al., 2013 ) and Sonsela Representative (Atchley mais aussi al., 2013 ) helps which theory, and they the newest specimens show that no less than from the PEFO, new stratigraphic range of R. callenderi runs to your hidden Adamanian holochronozone. Its lack of Roentgen. callenderi from the other penecontemporaneous internet regarding the American Southwestern is puzzling, such as considering just how abundant it’s in the internet where they does occur. For example, the new vertebrate assemblage of your own Petrified Forest Member at the Ghost Farm inside the north The fresh new Mexico are geographically intermediate amongst the kind of area of Roentgen. callenderi and PEFO, offers brand new visibility numerous Revueltian index taxa (Irmis, Nesbitt, mais aussi al., 2007 ; Whiteside ainsi que al., 2015 ), and has appropriate age restrictions that show they overlaps as time passes toward all the way down Petrified Tree User during the PEFO (Irmis et al., 2011 ; Rasmussen et al., 2020 ). There’s no visible taphonomic reason why this really-sampled and diverse assemblage ought not to uphold Revueltosaurus, because contains from brief-bodied drepanosaurs in order to highest-bodied phytosaurs and you may aetosaurs. Furthermore, it’s curious you to R. callenderi has not been found at almost every other Bull Canyon Creation sites or perhaps in equivalent strata in the western Texas (age.grams., Lehman & Chatterjee, 2005 ; ).
