Journal Articles
Parker WG, Reyes WA, Marsh AD. 2023. Incongruent maturity indicators in a Late Triassic archosaur (Aetosauria: Typothorax coccinarum). The Anatomical Record (early view). https://doi.org/10.1002/ar.25343.
Kligman BT, Gee BM, Marsh AD, Nesbitt SJ, Smith ME, Parker WG, Stocker MR. 2023. Triassic stem caecilian supports dissorophoid origin of living amphibians. Nature 614: 102-107. https://doi.org/10.1038/s41586-022-05646-5.
Marsh AD, Parker WG, Nesbitt SJ, Kligman BT, Stocker MR. 2022. Puercosuchus traverorum n. gen. n. sp.: a new malerisaurine azendohsaurid (Archosauromorpha: Allokotosauria) from two monodominant bonebeds in the Chinle Formation (Upper Triassic, Norian) of Arizona. Journal of Paleontology 96 (Memoir 90): 1-39. http://dx.doi.org/10.1017/jpa.2022.49.
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Nesbitt SJ, Stocker MR, Ezcurra MD, Fraser NC, Heckert AB, Parker WG, Mueller B, Sengupta S, Bandyopadhyay S, Pritchard AC, Marsh AD. 2021. Widespread azendohsaurids (Archosauromorpha: Allokotosauria) from the Late Triassic of the western United States and India. Papers in Palaeontology 8: e1413. https://doi.org/10.1002/spp2.1413.
Parker WG, Nesbitt SJ, Marsh AD, Kligman BT, Bader K. 2021. First occurrence of Doswellia cf. D. kaltenbachi (Archosauriformes) from the Late Triassic (middle Norian) Chinle Formation of Arizona and its implications on proposed biostratigraphic correlations across North America during the Late Triassic. Journal of Vertebrate Paleontology 41: e1976196. https://doi.org/10.1080/02724634.2021.1976196.
Parker WG, Nesbitt SJ, Irmis RB, Martz JW, Marsh AD, Brown MA, Stocker MR, Werning SW. 2021. Osteology, histology, and relationships of Revueltosaurus callenderi (Archosauria: Suchia) from the Upper Triassic (Norian) Chinle Formation of Petrified Forest National Park, Arizona, USA. Anatomical Record (early view). https://doi.org/10.1002/ar.24757.
Marsh AD, Milner ARC, Harris JD, DeBlieux DD, Kirkland JI. 2021. A non-averostran neotheropod vertebra (Dinosauria: Theropoda) from the earliest Jurassic Whitmore Point Member (Moenave Formation) in southwestern Utah. Journal of Vertebrate Paleontology 41: e1897604. https://doi.org/10.1080/02724634.2021.1897604.
Marsh AD, Parker WG, Miller AE. 2021. Mesozoic paleontology of Grand Canyon National Park: trace fossils, stratigraphy, and regional correlations. Utah Geological Association Special Publications 1: 205-218. https://giw.utahgeology.org/giw/index.php/uga-sp/article/view/87.
Reyes WA, Parker W.G., Marsh AD. 2021. Cranial anatomy and dentition of the aetosaur Typothorax coccinarum (Archosauria: Pseudosuchia) from the Upper Triassic Chinle Formation of Arizona. Journal of Vertebrate Paleontology 40: e1876080. https://doi.org/10.1080/02724634.2020.1876080.
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Hégron A, Stocker MR, Marsh AD, Nesbitt SJ. 2020. Archosauromorphs from the Lamy Quarry, Garita Creek Formation (Adamanian, Late Triassic), New Mexico, USA. Palaeodiversity 13: 135 149. https://doi.org/10.18476/pale.v13.a11.
Marsh AD, Parker WG. 2020. New dinosauromorph specimens from Petrified Forest National Park and a global biostratigraphic review of Triassic dinosauromorph body fossils. PaleoBios 37: 1-56. https://escholarship.org/uc/item/01w536hs.
Kligman BT, Marsh AD, Sues H-D, Sidor CA. 2020. A new non-mammalian eucynodont from the Chinle Formation (Triassic: Norian), and implications for the early Mesozoic equatorial cynodont record. Biology Letters 16: 20200631. https://doi.org/10.1098/rsbl.2020.0631.
Marsh AD, Smith ME, Parker WG, Irmis RB, Kligman BT. 2020. Skeletal anatomy of Acaenasuchus geoffreyi Long and Murry, 1995 (Archosauria: Pseudosuchia), a member of a new clade of armored archosaurs. Journal of Vertebrate Paleontology 40: e1794885. https://doi.org/10.1080/02724634.2020.1794885.
Jenkins XA, Pritchard AC, Marsh AD, Kligman BT, Sidor CA, Reed KE. 2020. Using manual ungual morphology to predict substrate use in the Drepanosauromorpha and the description of a new species. Journal of Vertebrate Paleontology 40: e1810058. https://doi.org/10.1080/02724634.2020.1810058.
Gehrels G, Giesler D, Olsen PE, Kent DE, Marsh AD, Parker WG, Rasmussen C, Mundil R, Irmis RB, Geissman J, Lepre CJ. 2020. LA-ICPMS U-Pb geochronology of detrital zircon grains form the Coconino, Moenkopi, and Chinle Formations in the Petrified Forest National Park (Arizona). Geochronology 2: 257-282. https://doi.org/10.5194/gchron-2-257-2020.
Marsh AD, Rowe TB. 2020. A comprehensive anatomical and phylogenetic evaluation of Dilophosaurus wetherilli (Dinosauria: Theropoda) with descriptions of new specimens from the Kayenta Formation of northern Arizona. Journal of Paleontology 94 (Memoir 78): 1-103. https://doi.org/10.1017/jpa.2020.14.
Kligman BT, Marsh AD, Nesbitt SJ, Parker WG, Stocker MR. 2020. New trilophosaurid species demonstrates a decline in allokotosaur diversity across the Adamanian-Revueltian boundary in the Late Triassic of western North America. Palaeodiversity 13:25-37. https://doi.org/10.18476/pale.v13.a3.
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Marsh AD, Parker WG, Langer MC, Nesbitt SJ. 2019. Redescription of the holotype specimen of Chindesaurus bryansmalli Long and Murry, 1995 (Dinosauria, Theropoda), from Petrified Forest National Park. Journal of Vertebrate Paleontology 39: e1645682. https://doi.org/10.1080/02724634.2019.1645682.
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Gee BM, Parker WG, Marsh AD. 2019. Redescription of Anaschisma (Temnospondyli: Metoposauridae) from the Late Triassic of Wyoming and the phylogeny of the Metoposauridae. Journal of Systematic Palaeontology. Online first: 1602855. https://www.tandfonline.com/doi/full/10.1080/14772019.2019.1602855.
Marsh AD, Parker WG, Stockli DF, Martz JW. 2019. Regional correlation of the Sonsela Member (Upper Triassic Chinle Formation) and detrital U-Pb zircon data from the Sonsela Sandstone bed near the Sonsela Buttes, northeastern Arizona, U.S.A., support the presence of a distributive fluvial system. Geosphere 15: 1-12. https://pubs.geoscienceworld.org/gsa/geosphere/article/570397/regional-correlation-of-the-sonsela-member-upper.
Stocker MR, Nesbitt SJ, Kligman BT, Paluh DJ, Marsh AD, Blackburn DC, Parker WG. 2019. The earliest equatorial frogs from the Late Triassic of Arizona. Biology Letters 15: 20180922. https://royalsocietypublishing.org/doi/10.1098/rsbl.2018.0922.
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Marsh AD. 2018. A new record of Dromomeron romeri Irmis et al., 2007 (Lagerpetidae) from the Chinle Formation of Arizona, U.S.A. PaleoBios 35: 1-8. https://escholarship.org/uc/item/8w5755sg.
Marsh AD, Rowe TB. 2018. Anatomy and systematics of the sauropodomorph Sarahsaurus aurifontanalis from the Early Jurassic Kayenta Formation. PLOS One 13: e0204007. https://doi.org/10.1371/journal.pone.0204007.
Lessner EJ, Parker WG, Marsh AD, Nesbitt SJ, Irmis RB, Mueller BD. 2018. New insights into Late Triassic dinosauromorph-bearing assemblages from Texas using apomorphy-based identifications. PaleoBios 35: 1-41. https://escholarship.org/uc/item/4ht19712.
Kligman BT, Marsh AD, Parker WG. 2018. First records of diapsid Palacrodon from the Norian, Late Triassic Chinle Formation of Arizona, and their biogeographic implications. Acta Palaeontologica Polonica 63: 117-127. https://www.ing.pan.pl/archive/published/app63/app004262017.pdf.
Kligman BT, Parker WG, Marsh AD. 2017. First record of Saurichthys (Actinopterygii) from the Upper Triassic (Chinle Formation, Norian) of western North America. Journal of Vertebrate Paleontology 37: e1367304. https://doi.org/10.1080/02724634.2017.1367304.
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Gee BM, Parker WG, Marsh AD. 2017. Microanatomy and paleohistology of the intercentra of North American metoposaurids from the Upper Triassic of Petrified Forest National Park (Arizona, USA) with implications for the taxonomy and ontogeny of the group. PeerJ 5: e3183. https://www.doi.org/10.7717/peerj.3183.
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Burroughs RW, Morris ZS, Marsh AD. 2014. Trachemys stripta (re-eared slider), Pseudemys texana (Texas river cooter), Chelydra serpentina (snapping turtle): feeding behavior and scavenging. Herpetological Review 45: 321-322. https://www.dropbox.com/s/rzpyzy2c5x9l849/HR%20June%202014%20ebook.pdf?dl=1.
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PUBLICATIONS
Griffin CT, Pezzoni NG, Pintore R, Irmis RB, Smith ND, Turner AH, Marsh AD, Nesbitt SJ. 2022. Early theropod hindlimbs evolved via shifts in ontogenetic timing. The Society for Integrative and Comparative Biology, Annual Meeting.
Foffa D, Dunne EM, Farnsworth A, Wynd BM, Butler RJ, Nesbitt SJ, Fraser NC, Brusatte SL, Lunt DJ, Barrett PM, Walsh S, Marsh AD, Kligman BT, Parker WG. 2022. Climate drivers of pterosaur origins. SVP Program and Abstracts Book 2022.
Marsh AD, DeBlieux DD, Kirkland JI. 2022. The first dinosaur skeletal fossils from the Kayenta Formation of Utah. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2022.
Patellos EA, Kligman BT, Marsh AD, Stocker MR, Parker WG, Nesbitt SJ. 2022. Quantifying variation in the marginal dentition of a malerisaurine (Allokotosauria) from the Upper Triassic Chinle Formation of Arizona shows statistically distinct morphologies within different tooth-bearing elements. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2022.
Kligman BT, Marsh AD, Parker WG, Nesbitt SJ, Reyes WA, Gee BM, Smith ME, Stocker MR. 2022. New Late Triassic paleocommunity recalibrates the rise of the modern tetrapod evolutionary fauna, placing new constraints on early Mesozoic extinctions. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2022.
Griffin CT, Pezzoni NG, Pintore R, Irmis RB, Smith ND, Turner AH, Marsh AD, Nesbitt SJ. 2022. Femoral ontogeny of the Triassic saurischian Tawa hallae suggests that neotheropod hindlimbs evolved via shifts in ontogenetic timing. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2022.
Sodano MP, Kligman BT, Stocker MR, Marsh AD, Parker WG, Pritchard AC, Nesbitt SJ. 2022. A new drepanosaur ungual morphotype from the Sonsela Member of Petrified Forest National Park. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2022.
Reyes WA, Parker WG, Marsh AD, Kligman BT. 2022. New specimens of Calyptosuchus wellesi (Psuedosuchia: Aetosauria) from the Upper Triassic Chinle Formation of Petrified Forest National Park, Arizona, provide new details on the cranial anatomy and intraspecific variation of the taxon. Geological Society of America Abstracts with Programs, v. 50.
Kwiatkowski CJ, Keating KA, Romaine-Elkhadri YA, Harries EL, Henderek RL, Szydlo MD, Hardes JG, Gillette DD, Thomson TJ, Milner ARC, Marsh AD, Miller AE, Kligman BT. 2022. A treasure trove of the Triassic tracks: reptile footprint fossils in the Moenkopi Formation revealed by two Scientists in Parks surveys at Wupatki National Monument, north-central Arizona. Geological Society of America Abstracts with Programs, v. 50.
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Marsh AD, Parker WG, Nesbitt SJ, Kligman BT, Stocker MR, Patellos EA. 2021. A new species of carnivorous azendohsaurid (Archosauromorpha) from the Chinle Formation of Petrified Forest National Park. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2021.
Kligman BT, Stocker MR, Marsh AD, Nesbitt SJ, Parker WG. 2021. New Late Triassic stem-caecilian from southwestern North America strengthens evidence for lissamphibian monophyly, and illuminates the anatomical, functional, and geographic origins of living caecilians. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2021.
Ezcurra MD, Marsh AD, Irmis RB, Nesbitt SJ. 2021. A revision of coelophysoid theropod specimens from Petrified Forest National Park, Arizona (U.S.A.), reveals a new species from the Upper Triassic Chinle Formation. Jornadas Argentinas de Paleontología de Vertebrados, Libro de Resúmenes: R16
Baez J, Kinney S, Chang C, Parker W, Marsh A, Olsen P. 2020. Did the Manicoagan Impact cause a biotic turnover 215.5 million years ago? Constraints from airfall and detrital zircon U-Pb LA-ICP-MS geochronology. Geological Society of America Abstracts with Programs.
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Marsh AD, Parker WG, Beightol CV, Sidor CA. 2020. Apomorphy-based identifications of recently collected dinosauromorph fossils from Petrified Forest National Park (Upper Triassic, Chinle Formation). Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2020.
Mellett MP, Kligman BT, Marsh AD, Parker WG, Nesbitt SJ, Stocker MR. 2020. Dental microwear analysis of two new species of trilophosaurid from the Chinle Formation (Arizona) reveals diversity of herbivorous diets within the clade. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2020.
Patellos EA, Kligman BT, Marsh AD, Stocker MR, Parker WG, Nesbitt SJ. 2020. Characterization of dental variation in a small azendohsaurid from the Chinle Formation (Upper Triassic) of Arizona indicates the abundance of azendohsaurids in Adamanian biozone assemblages. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2020.
Reyes WA, Parker WG, Marsh AD. 2020. Cranial analysis of Aetosauria based on the cranial anatomy and dentition of Typothorax coccinarum (Archosauria: Pseudosuchia) from the Upper Triassic Chinle Formation of northern Arizona. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2020.
Smith ME, Kligman BT, Yarborough V, Marsh AD. 2020. Screenwashing, micropreparation, and micro CT: a case study of how preparation workflow facilitates research on microfossil localities at Petrified Forest National Park. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2020.
Sodano MP, Kligman BT, Stocker MR, Marsh AD, Parker WG, Pritchard AC, Nesbitt SJ. 2020. Unique internal and external morphologies of manual unguals of Drepanosauromorpha help identify isolated skeletal elements and geographic distribution of the clade in the western U.S.A. during the Late Triassic and beyond. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2020.
Eddins HMS, Kligman BT, Nesbitt SJ, Marsh AD, Parker WG, Stocker MR. 2020. New Triassic reptile reveals oldest record of a complete envenomation apparatus. Society for Integrative and Comparative Biology Program: 61.
Kligman BT, Stocker MR, Nesbitt SJ, Marsh AD, Parker WG. 2019. New trilophosaurid species demonstrates extinction-driven drop in allokotosaur diversity across the Adamanian-Revueltian biozone boundary in the Late Triassic of western North America. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2019: 131.
Davis EB, Ghezzo E, Massironi M, Malavasi S, Bianucci G, Gioncada A, Marsh AD, Parker WG, Hopkins SS. 2019. High resolution remote sensing applied to paleontology: case studies from satellite imagery and conventional camera photos. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2019: 87.
Marsh AD. 2019. A near miss, the importance of public museum collections, and a global range extension of non-dinosaur dinosauromorphs in North America. Geological Society of America Abstracts with Programs 51: 251.
Bevers J, Neff C, Hernandez G, Curtis D, Fiorentino S, Marsh AD, Smith M, Kligman B.T. 2019. First two seasons surveys of fossils from four Hemphillian localities at Petrified Forest National Park. Geological Society of America Abstracts with Programs 51: 237.
Gehrels G, Giesler D, Olsen PE, Kent DE, Marsh AD, Parker WG, Rasmussen C, Mundil R, Irmis RB, Geissman J. 2019. LA-ICPMS U-Pb geochronology of detrital zircon grains from the Chinle Formation (Colorado Plateau Coring Project). Geological Society of America Abstracts with Programs 51: 177.
Parker WG, Marsh AD, Beightol CV. 2019. Examining Late Triassic (Norian-Rhaetian) terrestrial faunal assemblage compositions in the Chinle Formation of northeastern Arizona. North American Paleontological Convention Program with Abstracts, PaleoBios 36: 277.
Marsh AD, Smith M, Parker WG, Kligman BT, Irmis RB. 2019. New specimens of Acaenasuchus geoffreyi (Archosauria) from Petrified Forest National Park (Arizona) support evidence for a new Triassic clade of armored pseudosuchians in North America. North American Paleontological Convention Program with Abstracts, PaleoBios 36: 233.
Ghezzo E, Giovanni B, Malavasi S, Marsh AD, Davis E. 2019. High-resolution multispectral images for fossil detection: applications of spectral properties of fossils to remote field surveys. North American Paleontological Convention Program with Abstracts, PaleoBios 36: 151.
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Marsh AD, Smith ME, Parker WG, Irmis RB, Kligman BT. 2018. New specimens of Acaenasuchus geoffreyi (Archosauria: Pseudosuchia) support the presence of a new Triassic clade of armored pseudosuchians. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2018: 4.
Beightol V CV, Parker WG, Martz JW, Marsh AD. 2018. Estimating the statistical error of observed biostratigraphic ranges within Adamanian-Revueltian vertebrate assemblages of the Late Triassic Chinle Formation of Arizona to test for an abrupt turnover event. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2018: 88.
Nesbitt SJ, Griffin C, Evans E, Mueller RT, Cabreira SF, Marsh AD, Wynd BM, Langer MC. 2018. Prevalent ontogenetic changes characterize early dinosaurs and their closest relatives: implications for species identification, phylogeny, and the loss of these changes in later dinosaurs. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2018: 190.
Parker WG, Stocker MR, Marsh AD. 2018. The purported Late Triassic crocodylomorph Parrishia mccreai is a juvenile phytosaur. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2018: 195.
Marsh AD. 2018. Anatomy, systematics, and geochronology of Dilophosaurus wetherilli. PaleoBios 35 (supplement): 10-11.
Marsh AD, Parker WG, Kligman BT, Lessner EJ. 2017. Bonebed of a carnivorous archosauromorph from the Chinle Formation (Late Triassic: Norian) from Petrified Forest National Park. Geological Society of America Abstracts 2017: 244.
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Nesbitt SJ, Stocker MS, Ezcurra M, Fraser NC, Heckert AB, Marsh AD, Parker WG, Mueller B, Pritchard AC. 2017. The ‘strange reptiles’ of the Triassic: the morphology, ecology, and taxonomic diversity of the clade Allokotosauria illuminated by the discovery of an early diverging member. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2017: 45.
Lessner EJ, Parker WG, Nesbitt SJ, Marsh AD, Irmis RB, Mueller B. 2017. Reconstructing Late Triassic vertebrate faunas from the Upper Triassic Dockum Group of Texas using apomorphy-based identifications. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2016: 149.
Marsh AD, Parker WG. 2017. Current paleontological research and opportunities at Petrified Forest National Park. PaleoBios 34(supplement): 8.
Marsh AD, Parker WG, Langer MC, Nesbitt SJ. 2016. An anatomical and phylogenetic revision of Chindesaurus bryansmalli from Petrified Forest National Park and its implication for the Late Triassic dinosaurian record of North America. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2016: 184.
Parker WG, Marsh AD, Nesbitt SJ, Stocker MR, Smith ME. 2016. The decline of early archosauromorphs in the Norian (Upper Triassic) in the low latitudes: new insights from the Upper Triassic Chinle Formation of Arizona. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2016: 202.
Marsh AD. 2015. A comprehensive study of Dilophosaurus wetherilli: anatomy, taxonomy, and evolutionary relationships of the first large-bodied theropod in North America. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2015: 175.
Marsh AD, Parker WG, Langer MC. 2015. New information on the holotype and referred specimens of Chindesaurus bryansmalli from Petrified Forest National Park. V Congreso Latinoamericano de Paleontologia Libro de Resumenes: 49.
Marsh AD. 2015. Anatomy and systematics of the early sauropodomorph Sarahsaurus aurifontanalis from the Kayenta Formation of Arizona, USA. V Congreso Latinoamericano de Paleontologia Libro de Resumenes: 96.
Marsh AD. 2014. Preliminary U-Pb detrital zircon dates from the Kayenta Formation of Arizona. PaleoBios 32 (supplement): 10.
Marsh AD, Rowe TB, Simonetti A, Stockli D, Stockli L. 2014. The age of the Kayenta Formation of northeastern Arizona: overcoming the challenges of dating fossil bone. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2014: 178.
Mossbrucker MT, Bakker RT, Marsh AD. 2013. Missing muzzle found: new skull material referable to Apatosaurus ajax (Marsh 1877) from the Morrison Formation of Morrison, Colorado. Geological Society of America Abstracts with Programs 45: 111.
Marsh AD, Brown MA, Colbert M, Rowe TB. 2012. Combining mechanical preparation and X-ray computed tomography techniques to visualize obscured morphology in a basal sauropodomorph dinosaur. Journal of Vertebrate Paleontology, SVP Program and Abstracts Book 2012: 20A.