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Randall B. Irmis - Publications

Geology & Geophysics University of Utah, Salt Lake City, UT 
Vertebrate Paleontology, Paleobiology, Paleoecology, Geochronology

58 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2023 Pritchard AC, Irmis RB, Olori JC, Nesbitt SJ, Smith ND, Stocker MR, Turner AH. The femora of Drepanosauromorpha (Reptilia: Diapsida): Implications for the functional evolution of the thigh of Sauropsida. Anatomical Record (Hoboken, N.J. : 2007). PMID 36847780 DOI: 10.1002/ar.25160  0.324
2022 Kelley NP, Irmis RB, dePolo PE, Noble PJ, Montague-Judd D, Little H, Blundell J, Rasmussen C, Percival LME, Mather TA, Pyenson ND. Grouping behavior in a Triassic marine apex predator. Current Biology : Cb. 32: 5398-5405.e3. PMID 36538877 DOI: 10.1016/j.cub.2022.11.005  0.307
2021 Melstrom KM, Turner AH, Irmis RB. Reevaluation of the cranial osteology and phylogenetic position of the early crocodyliform Eopneumatosuchus colberti, with an emphasis on its endocranial anatomy. Anatomical Record (Hoboken, N.J. : 2007). PMID 34679248 DOI: 10.1002/ar.24777  0.312
2021 Parker WG, Nesbitt SJ, Irmis RB, Martz JW, Marsh AD, Brown MA, Stocker MR, Werning S. Osteology and relationships of Revueltosaurus callenderi (Archosauria: Suchia) from the Upper Triassic (Norian) Chinle Formation of Petrified Forest National Park, Arizona, United States. Anatomical Record (Hoboken, N.J. : 2007). PMID 34585850 DOI: 10.1002/ar.24757  0.723
2021 Melstrom KM, Angielczyk KD, Ritterbush KA, Irmis RB. The limits of convergence: the roles of phylogeny and dietary ecology in shaping non-avian amniote crania. Royal Society Open Science. 8: 202145. PMID 34540239 DOI: 10.1098/rsos.202145  0.608
2020 Ezcurra MD, Nesbitt SJ, Bronzati M, Dalla Vecchia FM, Agnolin FL, Benson RBJ, Brissón Egli F, Cabreira SF, Evers SW, Gentil AR, Irmis RB, Martinelli AG, Novas FE, Roberto da Silva L, Smith ND, et al. Enigmatic dinosaur precursors bridge the gap to the origin of Pterosauria. Nature. PMID 33299179 DOI: 10.1038/s41586-020-3011-4  0.33
2020 Rasmussen C, Mundil R, Irmis RB, Geisler D, Gehrels GE, Olsen PE, Kent DV, Lepre C, Kinney ST, Geissman JW, Parker WG. U-Pb zircon geochronology and depositional age models for the Upper Triassic Chinle Formation (Petrified Forest National Park, Arizona, USA): implications for Late Triassic paleoecological and paleoenvironmental change Geological Society of America Bulletin. DOI: 10.7916/D8-K9R9-S495  0.543
2020 Sues H, Schoch RR, Sobral G, Irmis RB. A new archosauriform reptile with distinctive teeth from the Middle Triassic (Ladinian) of Germany Journal of Vertebrate Paleontology. 40: e1764968. DOI: 10.1080/02724634.2020.1764968  0.44
2020 Mancuso AC, Benavente CA, Irmis RB, Mundil R. Evidence for the Carnian Pluvial Episode in Gondwana: New multiproxy climate records and their bearing on early dinosaur diversification Gondwana Research. 86: 104-125. DOI: 10.1016/J.Gr.2020.05.009  0.49
2019 Schachner ER, Irmis RB, Huttenlocker AK, Sanders K, Cieri RL, Nesbitt SJ. Osteology of the Late Triassic Bipedal Archosaur Poposaurus gracilis (Archosauria: Pseudosuchia) from Western North America. Anatomical Record (Hoboken, N.J. : 2007). PMID 31814308 DOI: 10.1002/Ar.24298  0.403
2019 Melstrom KM, Irmis RB. Repeated Evolution of Herbivorous Crocodyliforms during the Age of Dinosaurs. Current Biology : Cb. PMID 31257139 DOI: 10.1016/J.Cub.2019.05.076  0.455
2019 Griffin CT, Bano LS, Turner AH, Smith ND, Irmis RB, Nesbitt SJ. Integrating gross morphology and bone histology to assess skeletal maturity in early dinosauromorphs: new insights from (Archosauria: Dinosauromorpha). Peerj. 7: e6331. PMID 30775169 DOI: 10.7717/Peerj.6331  0.373
2019 Mancuso AC, Irmis RB. The Large-Bodied Dicynodont Stahleckeria (Synapsida, Anomodontia) from the Upper Triassic (Carnian) Chañares Formation (Argentina); New Data for Triassic Gondwanan Biogeography Ameghiniana. 57: 45. DOI: 10.5710/Amgh.20.12.2019.3302  0.468
2019 Bradley AB, Burch SH, Turner AH, Smith ND, Irmis RB, Nesbitt SJ. Sternal elements of early dinosaurs fill a critical gap in the evolution of the sternum in Avemetatarsalia (Reptilia: Archosauria) Journal of Vertebrate Paleontology. 39: e1700992. DOI: 10.1080/02724634.2019.1700992  0.312
2019 Kent DV, Olsen PE, Lepre C, Rasmussen C, Mundil R, Gehrels GE, Giesler D, Irmis RB, Geissman JW, Parker WG. Magnetochronology of the Entire Chinle Formation (Norian Age) in a Scientific Drill Core From Petrified Forest National Park (Arizona, USA) and Implications for Regional and Global Correlations in the Late Triassic Geochemistry, Geophysics, Geosystems. 20: 4654-4664. DOI: 10.1029/2019Gc008474  0.546
2019 Goodwin MB, Irmis RB, Wilson GP, DeMar DG, Melstrom K, Rasmussen C, Atnafu B, Alemu T, Alemayehu M, Chernet SG. The first confirmed sauropod dinosaur from Ethiopia discovered in the Upper Jurassic Mugher Mudstone Journal of African Earth Sciences. 159: 103571. DOI: 10.1016/J.Jafrearsci.2019.103571  0.453
2018 Wiersma JP, Irmis RB. A new southern Laramidian ankylosaurid, gen. et sp. nov., from the upper Campanian Kaiparowits Formation of southern Utah, USA. Peerj. 6: e5016. PMID 30065856 DOI: 10.7717/Peerj.5016  0.508
2018 Kent DV, Olsen PE, Rasmussen C, Lepre C, Mundil R, Irmis RB, Gehrels GE, Giesler D, Geissman JW, Parker WG. Empirical evidence for stability of the 405-kiloyear Jupiter-Venus eccentricity cycle over hundreds of millions of years. Proceedings of the National Academy of Sciences of the United States of America. PMID 29735684 DOI: 10.1073/Pnas.1800891115  0.566
2018 Matzke NJ, Irmis RB. Including autapomorphies is important for paleontological tip-dating with clocklike data, but not with non-clock data. Peerj. 6: e4553. PMID 29637019 DOI: 10.7717/Peerj.4553  0.389
2018 Olsen PE, Geissman JW, Kent DV, Gehrels GE, Mundil R, Irmis RB, Lepre C, Rasmussen C, Giesler D, Parker WG, Zakharova N, Kürschner WM, Miller C, Baranyi V, Schaller MF, et al. Colorado Plateau Coring Project, Phase I (CPCP-I): a continuously cored, globally exportable chronology of Triassic continental environmental change from western North America Scientific Drilling. 24: 15-40. DOI: 10.5194/Sd-24-15-2018  0.563
2018 Mancuso AC, Benavente CA, Previtera E, Arcucci AB, Irmis RB. Carnivore coprolites from the lower Carnian (Upper Triassic) Chañares Formation, northwestern Argentina Palaeogeography, Palaeoclimatology, Palaeoecology. 489: 15-28. DOI: 10.1016/J.Palaeo.2017.07.032  0.407
2016 Pritchard AC, Turner AH, Irmis RB, Nesbitt SJ, Smith ND. Extreme Modification of the Tetrapod Forelimb in a Triassic Diapsid Reptile. Current Biology : Cb. PMID 27693141 DOI: 10.1016/J.Cub.2016.07.084  0.383
2016 Lessner EJ, Stocker MR, Smith ND, Turner AH, Irmis RB, Nesbitt SJ. A new rauisuchid (Archosauria, Pseudosuchia) from the Upper Triassic (Norian) of New Mexico increases the diversity and temporal range of the clade. Peerj. 4: e2336. PMID 27651983 DOI: 10.7717/Peerj.2336  0.459
2016 Lindström S, Irmis RB, Whiteside JH, Smith ND, Nesbitt SJ, Turner AH. Palynology of the upper Chinle Formation in northern New Mexico, U.S.A.: Implications for biostratigraphy and terrestrial ecosystem change during the Late Triassic (Norian-Rhaetian) Review of Palaeobotany and Palynology. 225: 106-131. DOI: 10.1016/J.Revpalbo.2015.11.006  0.474
2016 Lecuona A, Ezcurra MD, Irmis RB. Revision of the early crocodylomorphTrialestes romeri(Archosauria, Suchia) from the lower Upper Triassic Ischigualasto Formation of Argentina: one of the oldest-known crocodylomorphs Papers in Palaeontology. 2: 585-622. DOI: 10.1002/spp2.1056  0.302
2015 Marsicano CA, Irmis RB, Mancuso AC, Mundil R, Chemale F. The precise temporal calibration of dinosaur origins. Proceedings of the National Academy of Sciences of the United States of America. PMID 26644579 DOI: 10.1073/Pnas.1512541112  0.465
2015 Whiteside JH, Lindström S, Irmis RB, Glasspool IJ, Schaller MF, Dunlavey M, Nesbitt SJ, Smith ND, Turner AH. Extreme ecosystem instability suppressed tropical dinosaur dominance for 30 million years. Proceedings of the National Academy of Sciences of the United States of America. PMID 26080428 DOI: 10.1073/Pnas.1505252112  0.423
2015 Ksepka DT, Parham JF, Allman JF, Benton MJ, Carrano MT, Cranston KA, Donoghue PC, Head JJ, Hermsen EJ, Irmis RB, Joyce WG, Kohli M, Lamm KD, Leehr D, Patané JL, et al. The Fossil Calibration Database-A New Resource for Divergence Dating. Systematic Biology. PMID 25922515 DOI: 10.1093/Sysbio/Syv025  0.717
2015 Pritchard AC, Turner AH, Nesbitt SJ, Irmis RB, Smith ND. Late Triassic tanystropheids (Reptilia, Archosauromorpha) from northern New Mexico (Petrified Forest Member, Chinle Formation) and the biogeography, functional morphology, and evolution of Tanystropheidae Journal of Vertebrate Paleontology. 35. DOI: 10.1080/02724634.2014.911186  0.492
2014 Barrett PM, Butler RJ, Mundil R, Scheyer TM, Irmis RB, Sánchez-Villagra MR. A palaeoequatorial ornithischian and new constraints on early dinosaur diversification. Proceedings. Biological Sciences / the Royal Society. 281: 20141147. PMID 25100698 DOI: 10.1098/Rspb.2014.1147  0.475
2013 Loewen MA, Irmis RB, Sertich JJ, Currie PJ, Sampson SD. Tyrant dinosaur evolution tracks the rise and fall of Late Cretaceous oceans. Plos One. 8: e79420. PMID 24223179 DOI: 10.1371/Journal.Pone.0079420  0.494
2013 Langer MC, Nesbitt SJ, Bittencourt JS, Irmis RB. Non-dinosaurian Dinosauromorpha Geological Society Special Publication. 379: 157-186. DOI: 10.1144/Sp379.9  0.452
2013 Irmis RB, Whiteside JH, Kammerer CF. Non-biotic controls of observed diversity in the paleontologic record: An example from the Permo-Triassic Karoo Basin of South Africa Palaeogeography, Palaeoclimatology, Palaeoecology. 372: 62-77. DOI: 10.1016/J.Palaeo.2012.07.014  0.385
2013 Thomson TJ, Irmis RB, Loewen MA. First occurrence of a tyrannosaurid dinosaur from the Mesaverde Group (Neslen Formation) of Utah: Implications for upper Campanian Laramidian biogeography Cretaceous Research. 43: 70-79. DOI: 10.1016/J.Cretres.2013.02.006  0.478
2012 Parham JF, Donoghue PC, Bell CJ, Calway TD, Head JJ, Holroyd PA, Inoue JG, Irmis RB, Joyce WG, Ksepka DT, Patané JS, Smith ND, Tarver JE, van Tuinen M, Yang Z, et al. Best practices for justifying fossil calibrations. Systematic Biology. 61: 346-59. PMID 22105867 DOI: 10.1093/Sysbio/Syr107  0.732
2012 Irmis RB, Whiteside JH. Delayed recovery of non-marine tetrapods after the end-permian mass extinction tracks global carbon cycle Proceedings of the Royal Society B: Biological Sciences. 279: 1310-1318. PMID 22031757 DOI: 10.1098/Rspb.2011.1895  0.394
2011 Irmis RB, Nesbitt SJ, Parker WG. Reappraisal of early dinosaur radiation Access Science. DOI: 10.1036/1097-8542.Yb110001  0.541
2011 Irmis RB, Mundil R, Martz JW, Parker WG. High-resolution U-Pb ages from the Upper Triassic Chinle Formation (New Mexico, USA) support a diachronous rise of dinosaurs Earth and Planetary Science Letters. 309: 258-267. DOI: 10.1016/J.Epsl.2011.07.015  0.578
2010 Pyenson ND, Irmis RB, Lipps JH. Comment on "Climate, critters, and cetaceans: Cenozoic drivers of the evolution of modern whales". Science (New York, N.Y.). 330: 178; author reply 17. PMID 20929760 DOI: 10.1126/Science.1189866  0.358
2010 Nesbitt SJ, Sidor CA, Irmis RB, Angielczyk KD, Smith RM, Tsuji LA. Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira. Nature. 464: 95-8. PMID 20203608 DOI: 10.1038/Nature08718  0.646
2010 Irmis RB, Whiteside JH. Newly integrated approaches to studying late triassic terrestrial ecosystems Palaios. 25: 689-691. DOI: 10.2110/Palo.2010.S06  0.412
2010 Butler RJ, Irmis RB, Langer MC. Preface to 'Late triassic terrestrial biotas and the rise of dinosaurs' special issue Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 101: v-ix. DOI: 10.1017/S1755691011020135  0.382
2010 Irmis RB. Evaluating hypotheses for the early diversification of dinosaurs Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 101: 397-426. DOI: 10.1017/S1755691011020068  0.455
2010 Brusatte SL, Nesbitt SJ, Irmis RB, Butler RJ, Benton MJ, Norell MA. The origin and early radiation of dinosaurs Earth-Science Reviews. 101: 68-100. DOI: 10.1016/J.Earscirev.2010.04.001  0.494
2009 Nesbitt SJ, Smith ND, Irmis RB, Turner AH, Downs A, Norell MA. A complete skeleton of a Late Triassic saurischian and the early evolution of dinosaurs. Science (New York, N.Y.). 326: 1530-3. PMID 20007898 DOI: 10.1126/Science.1180350  0.494
2009 Nesbitt SJ, Irmis RB, Parker WG, Smith ND, Turner AH, Rowe T. Hindlimb osteology and distribution of basal dinosauromorphs from the late Triassic of North America Journal of Vertebrate Paleontology. 29: 498-516. DOI: 10.1671/039.029.0218  0.714
2009 Pyenson ND, Irmis RB, Lipps JH, Barnes LG, Mitchell ED, McLeod SA. Origin of a widespread marine bonebed deposited during the middle Miocene Climatic Optimum Geology. 37: 519-522. DOI: 10.1130/G25509A.1  0.439
2008 Parham JF, Irmis RB. Caveats on the use of fossil calibrations for molecular dating: a comment on Near et al. The American Naturalist. 171: 132-6; author reply . PMID 18171158 DOI: 10.1086/524198  0.64
2008 Parker WG, Stocker MR, Irmis RB. A new desmatosuchine aetosaur (Archosauria: Suchia) from the upper triassic tecovas formation (Dockum Group) of Texas Journal of Vertebrate Paleontology. 28: 692-701. DOI: 10.1671/0272-4634(2008)28[692:Andaas]2.0.Co;2  0.58
2008 Irmis RB, Knoll F. New ornithischian dinosaur material from the Lower Jurassic Lufeng Formation of China Neues Jahrbuch Fur Geologie Und Palaontologie - Abhandlungen. 247: 117-128. DOI: 10.1127/0077-7749/2008/0247-0117  0.482
2007 Irmis RB, Nesbitt SJ, Padian K, Smith ND, Turner AH, Woody D, Downs A. A Late Triassic dinosauromorph assemblage from New Mexico and the rise of dinosaurs. Science (New York, N.Y.). 317: 358-61. PMID 17641198 DOI: 10.1126/Science.1143325  0.642
2007 Irmis RB. Axial skeleton ontogeny in the parasuchia (Archosauria: Pseudosuchia) and its implications for ontogenetic determination in Archosaurs Journal of Vertebrate Paleontology. 27: 350-361. DOI: 10.1671/0272-4634(2007)27[350:Asoitp]2.0.Co;2  0.352
2007 Irmis RB, Parker WG, Nesbitt SJ, Liu J. Early ornithischian dinosaurs: The triassic record Historical Biology. 19: 3-22. DOI: 10.1080/08912960600719988  0.655
2007 Nesbitt SJ, Irmis RB, Parker WG. A critical re-evaluation of the late triassic dinosaur taxa of North America Journal of Systematic Palaeontology. 5: 209-243. DOI: 10.1017/S1477201907002040  0.61
2006 Irmis RB, Elliott DK. Taphonomy of a Middle Pennsylvanian marine vertebrate assemblage and an actualistic model for marine abrasion of teeth Palaios. 21: 466-479. DOI: 10.2110/Palo.2005.P05-105R  0.376
2005 Parker WG, Irmis RB, Nesbitt SJ, Martz JW, Browne LS. The Late Triassic pseudosuchian Revueltosaurus callenderi and its implications for the diversity of early ornithischian dinosaurs. Proceedings. Biological Sciences / the Royal Society. 272: 963-9. PMID 16024353 DOI: 10.1098/Rspb.2004.3047  0.647
2005 Irmis RB, Parker WG. Unusual tetrapod teeth from the Upper Triassic Chinle Formation, Arizona, USA Canadian Journal of Earth Sciences. 42: 1339-1345. DOI: 10.1139/E05-031  0.54
2005 Nesbitt SJ, Irmis RB, Lucas SG, Hunt AP. A giant crocodylomorph from the Upper Triassic of New Mexico PaläOntologische Zeitschrift. 79: 471-478. DOI: 10.1007/Bf02988373  0.412
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