Most planning off specimens is actually accomplished by Pete Reser, Bruce Bailey, Emily Lessner, Cathy Lash, Matt Smith, and you may Kenny Bader

Most planning off specimens is actually accomplished by Pete Reser, Bruce Bailey, Emily Lessner, Cathy Lash, Matt Smith, and you may Kenny Bader

The newest experts thank Petrified Tree National Playground Superintendents Lee Baiza, Cliff Spencer, and Brad Traver, Chiefs out of Financial support Government Karen Dorn and you can Pat Thompson, while the rest of the park personnel having logistical service. Excavation works try helped from the Yasemin Tulu, Katie Brakora, Bruce Bailey, Franceska Sena, Meredith Fontana, Susan Drymala, Jake Tapaha, Ben Kligman, Emily Lessner, Pete Reser, therefore the later Vin Morgan. Thank you so much to help you Religious Sidor and Kelsey Abrams (UWBM) for thinking, photo, and you will entry to specimens within their facilities. Additional direction in the world is available with new NPS Youth Preservation Corps and also the Navajo Maintenance Corps. Even more photos and you can pictures have been done-by Tyra Olstad. Dr. Pat Holroyd (UCMP) please provided accessibility collections in her proper care. K. Ritterbush (College or university out of Utah) nicely offered access to this lady petrographic microscope imaging program, therefore the osteoderm histological slides have been imaged by the J. Hambleton. Ratings from the Hans-Dieter Sues, Julia B. Desojo, and Martin Ezcurra improved the fresh new manuscript. It is Petrified Tree National Playground Paleontological Share Zero. 74. The brand new feedback shown herein are the ones of one’s people and you may carry out maybe not portray the state viewpoints of your U. S. Bodies.

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William Parker: Conceptualization (equal); formal investigation (lead); funding purchase (lead); data (lead); methodology (lead); venture government (lead); writing – brand spanking new write (equal); composing – opinion and you will modifying (equal). Sterling Nesbitt: Conceptualization (supporting); certified data (equal); research (equal); methods (equal); creating – brand spanking new draft (equal); writing – comment and editing (equal). Randall Irmis: Conceptualization (equal); authoritative studies (equal); investigation (equal); methods (equal); composing – fresh draft (equal); writing – remark and you may modifying (equal). Jeffrey Martz: Specialized data (supporting); studies (supporting); methodology (supporting); visualization (equal); writing – new write (supporting); creating – comment and you may modifying (supporting). Adam Marsh: Data curation (supporting); specialized investigation (supporting); research (supporting); methodology (equal); writing – review and editing (lead). Matthew Brown: Study (equal); methods (equal); creating – unique write (equal); writing – remark and you will editing (equal). Michelle Stocker: Official research (supporting); research (supporting); methods (supporting); resources (supporting); writing – comment and you may editing (supporting). Sarah Werning: Authoritative study (supporting); study (supporting); methods (supporting); visualization (supporting); composing – fresh write (supporting); writing – review and you will editing (supporting).

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One among these key early-branching pseudosuchians try R. callenderi, that has been to start with also known as a great putative ornithischian dinosaur considering remote, but apomorphic, pearly whites regarding the Bull Canyon Formation (Dockum Class) of eastern The fresh new Mexico, You (Have a look, 1989 ). Further education (age.g., Heckert, 2002 ; Appear, 2001 ; Search & Lucas, 1994 ; Padian, 1990 ) identified a lot more dental care specimens from other localities and you may proceeded to recognize Roentgen. callenderi once the an enthusiastic unambiguous dinosaur possessing ornithischian synapomorphies. Search ( 1994 , 2001 ) in addition to indexed the clear presence of a limited skeleton out-of a keen armored pseudosuchian (NMMNH P-16932) throughout the method of area of R. callenderi, which he said to be a definite taxon, but don’t formally explained. The latest finding from related skeletal issue in addition to cranial situation with in situ teeth regarding an effective monodominant bonebed (sensu Eberth, Shannon, & Noland, 2007 ) on Petrified Tree Member of the new Chinle Development at the Petrified Tree Federal Park (PEFO), Washington, You, demonstrably shown you to definitely Roentgen. callenderi was not a dinosaur, but rather a young-diverging pseudosuchian (Parker ainsi que al., 2005 ). Predicated on that brand new recommendations, Look et al., ( 2005 ) referred NMMNH P-16932 to R. callenderi. Although the dysfunction of that thing is temporary, what is important for three explanations: (a) NMMNH P-16932 certainly stands for Roentgen. callenderi while the specimen is sold with good dentigerous maxilla which have teeth retaining Roentgen. callenderi apomorphies; (b) it’s from most close to the particular area off R. callenderi, each other geographically and you can stratigraphically (Hunt ainsi que al., 2005 ); and you can (c) NMMNH P-16932 is just like the fresh new PEFO skeletal point allotted to R. callenderi by the Parker et al. ( 2005 ). The latest genus Revueltosaurus incorporated several other varieties, “R”. hunti Heckert, 2002 , identified off pearly whites and you can bones on the down Chinle Development regarding Arizona and Utah minimizing Dockum Number of The brand new Mexico, and you may “R”. olseni (Search & Lucas, 1994 ), known out-of pearly whites in the Pekin Development out of Vermont, United states.

Besides the eponymous taxon, really the only almost every other specimens away from PFV 297 was fragmentary shuvosaurid bones (e.grams., PEFO 34072) receive ex boyfriend-situ (Parker et al., 2005 ), and you can isolated higher, serrated pearly whites. They truly are white teeth identifiable in order to phytosaurs and you may a huge mediolaterally compacted recurved tooth (top size = 63.step three mm) with a beneficial resorbed resources which may depict an enormous paracrocodylomorph (PEFO 41401). In contrast, PFV 231 saves a very diverse assemblage and R. callenderi (e.g., PEFO 33791), new low-archosaur archosauriform Vancleavea campi (PEFO 33978), indeterminate small metoposaurid temnospondyls (age.g., PEFO 34081), shuvosaurids (e.g., PEFO 33953), rauisuchids (sensu Nesbitt, 2011 ; elizabeth.grams., PEFO 33954), crocodylomorphs (e.g., PEFO 34090), mystriosuchine leptosuchomorph phytosaurs (PEFO 33980), the aetosaur Typothorax coccinarum (e.grams., PEFO 33967), early-diverging theropod dinosaur Chindesaurus bryansmalli (PEFO 33982), and you will a coelophysoid theropod (elizabeth.g., PEFO 33981; Parker mais aussi al., 2005 ; Parker & Irmis, 2005 ; Irmis, 2008 ; Parker & Barton, 2008 ; Parker & ).


The cause of death of these folks are not familiar; yet not, monodominant bonebeds can be designed from the solitary devastating incidents where blend regarding taxa, the consequence of enough time-name attritional accumulation, doesn’t exists (Eberth & Brinkman, 1997 ). Curiously, the people at the PFV 297 and you may PFV 414 are alongside a comparable dimensions (Study S2) and presumably was indeed at equivalent ontogenetic amounts (but come across Griffin et al., 2020 to have a dialogue to your size and you can ontogenetic condition); not, PFV 231 consists of individuals of individuals types as well as specimens larger compared to those during the most other two sites; instance, brand new frontal out of PEFO 41453 was

The brand new matrix is constructed when you look at the Mesquite v3.ten (Maddison & Maddison, 2019 ) and you may consists of a total of 444 characters to have 91 taxa. The brand new rhynchosaur Mesosuchus browni was applied since outgroup so you’re able to supply the most parsimonious woods (MPTs). This new dataset was reviewed into the PAUP*cuatro.0b10 (Swofford, 2002 ) having fun with good heuristic look exposed to step one,000 arbitrary inclusion replicates which have forest bisection and reconnection department exchanging. Letters thirty two, 52, 121, 137, 139, 156, 168, 188, 223, 247, 258, 269, 271, 291, 297, 314, 328, 356, 371, 399, 413, 430, and you will 432 (get a hold of Nesbitt et al., 2020 for buying improvement of new Nesbitt, 2011 dataset) was ordered. Zero-length twigs was indeed folded once they lacked support not as much as any of the quintessential parsimonious reconstructions. A comparable topology and also the exact same quantity of MPTs is recovered whenever all the emails are run unordered, even if a different forest size was found. Bootstrap service are determined from 1,100 replicates having fun with good heuristic browse approach which have random taxon addition succession and TBR part exchanging.

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