A new centrosaurine from the Late Cretaceous of Alberta, Canada, and the evolution of parietal ornamentation in horned dinosaurs

• Autorzy: Farke A.A. , Ryan M. J. , Barrett P. M. , Tanke D. H. , Braman D. R. , Loewen M. A. , Graham M. R.
• Języki publikacji: EN

Abstrakty

EN

In 1916, a centrosaurine dinosaur bonebed was excavated within the Campanian−aged deposits of what is now Dinosaur Provincial Park, Alberta, Canada. Specimens from this now−lost quarry, including two parietals, a squamosal, a skull missing the frill, and an incomplete dentary, were purchased by The Natural History Museum, London. The material was recently reprepared and identified herein as a previously unknown taxon, Spinops sternbergorum gen. et sp. nov. Based upon the available locality data and paleopalynology, the quarry lies in either the upper part of the Oldman Formation or the lower part of the Dinosaur Park Formation. The facial region of the partial skull is similar to putative mature specimens of Centrosaurusspp. and Styracosaurus albertensis, with short, rounded postorbital horncores and a large, erect nasal horncore. Parietal ornamentation is consistent on both known parietals and is unique among ceratopsids. Bilateral, procurved parietal hooks occupy the P1 (medial−most) position on the dorsal surface of the parietal and are very similar to those seen in Centrosaurus apertus. Epiparietals in the P2 or possibly P3 position (lateral to P1) manifest as extremely elongate, caudally directed spikes, unlike the condition in C. apertus, S. albertensis, or any other “derived” centrosaurine. Cladistic analysis suggests that S. sternbergorum is closely related to Centrosaurus and Styracosaurus. Historically, based upon the condition in Styracosaurus and related centrosaurines, it was assumed that the medial−most elongated spikes on centrosaurine parietals correspond to the P3 epiparietal position. The exception illustrated in the new taxon suggests that homologies of epiparietals among basal centrosaurines (e.g., Albertaceratops and Diabloceratops) and derived centrosaurines (e.g., Styracosaurus and “pachyrhinosaurs”) should be reconsidered. The medially−placed, caudally−directed “P3” process of basal centrosaurines may, in fact, be homologous with P2.

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2011
• Tom: 56
• Numer: 4
• Opis fizyczny: p.691-702,fig.,ref.

Twórcy

autor

Farke A.A.

• Raymond M. Alf Museum of Paleontology, 1175 West Baseline Road, Claremont, CA 91711, USA

autor

Ryan M. J.

• Department of Vertebrate Paleontology, Cleveland Museum of Natural History, 1 Wade Oval Drive, Cleveland, OH 44106, USA

autor

Barrett P. M.

• Department of Palaeontology, Natural History Museum, Cromwell Road, London SW7 5BD, U.K.

autor

Tanke D. H.

• Royal Tyrrell Museum of Palaeontology, P.O. Box 7500, Drumheller, AB T0J 0Y0, Canada

autor

Braman D. R.

• Royal Tyrrell Museum of Palaeontology, P.O. Box 7500, Drumheller, AB T0J 0Y0, Canada

autor

Loewen M. A.

• Department of Geology and Geophysics, University of Utah, 301 Wakara Way, Salt Lake City, UT 84108, USA
• Natural History Museum of Utah, 301 Wakara Way, Salt Lake City, UT 84108, USA

autor

Graham M. R.

• Department of Palaeontology, Natural History Museum, Cromwell Road, London SW7 5BD, U.K.

Bibliografia

• Barrick, R.E., Stoskopf, M.K., Marcot, J.D., and Russell, D.A. 1998. The thermoregulatory functions of the Triceratopsfrill and horns: Heat flow measured with oxygen isotopes. Journal of Vertebrate Paleontology 18: 746–750.
• Clayton, K., Loewen, M., Sampson, S., Farke, A., and Irmis, R. 2009. Epiparietal homology within Centrosaurinae (Ornithischia, Ceratopsidae): a re−evaluation based on newly discovered basal taxa. Journal of Vertebrate Paleontology 29 (Supplement to No. 3): 80A.
• Currie, P.J. 2005. History of research. In: P.J. Currie and E.B. Koppelhus (eds.), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed, 3–33. Indiana University Press, Bloomington.
• Currie, P.J., and Dodson, P. 1984. Mass death of a herd of ceratopsian dinosaurs. In: W.E. Reif and F. Westphal (eds.), Third Symposium of Mesozoic Terrestrial Ecosystems, 52–60. Attempto Verlag, Tübingen.
• Currie, P.J., and Russell, D.A. 2005. The geographic and stratigraphic distribution of articulated and associated dinosaur remains.In: P.J. Currie and E.B. Koppelhus (eds.), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed, 537–569. Indiana University Press, Bloomington.
• Currie, P.J., Langston, W. Jr., and Tanke, D.H. 2008. A new species of Pachyrhinosaurus (Dinosauria, Ceratopsidae) from the Upper Cretaceous of Alberta. In: P.J. Currie, W. Langston, Jr., and D.H. Tanke (eds.), A New Horned Dinosaur from an Upper Cretaceous Bone Bed in Alberta, 1–108. NRC Research Press, Ottawa.
• Dodson, P. 1986. Avaceratops lammersi: A new ceratopsid from the Judith River Formation of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 138: 305–317.
• Dodson, P. and Farlow, J.O. 1997. The forelimb carriage of ceratopsid dinosaurs. In: D.L. Wolberg, E. Stump, and G.D. Rosenberg (eds.), Dinofest International: Proceedings of a Symposium Held at Arizona State University, 393–398. Academy of Natural Sciences of Philadelphia, Philadelphia.
• Eberth, D.A. 2005. The Geology. In: P.J. Currie and E.B. Koppelhus (eds.), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed, 54–82. Indiana University Press, Bloomington.
• Farke, A.A. 2004. Horn use in Triceratops (Dinosauria: Ceratopsidae): Testing behavioral hypotheses using scale models. Palaeontologia Electronica 7: 1–10.
• Farke, A.A. 2010. Evolution, homology, and function of the supracranial sinuses in ceratopsian dinosaurs. Journal of Vertebrate Paleontology 30: 1486–1500.
• Farlow, J.O. and Dodson, P. 1975. The behavioral significance of frill and horn morphology in ceratopsian dinosaurs. Evolution 29: 353–361.
• Fujiwara, S. 2009. A reevaluation of the manus structure in Triceratops (Ceratopsia: Ceratopsidae). Journal of Vertebrate Paleontology 29: 1136–1147.
• Gilmore, C.W. 1930. On dinosaurian reptiles from the Two Medicine Formation of Montana. Proceedings of the United States National Museum 77: 1–10.
• Goloboff, P., Farris, J., and Nixon, K. 2008. TNT, a free program for phylogenetic analysis. Cladistics 24: 774–786.
• Hatcher, J.B., Marsh, O.C., and Lull, R.S. 1907. The Ceratopsia. United States Geological Survey Monograph 49: 1–300.
• Holmes, R.B., Forster, C., Ryan, M., and Shephard, K.M. 2001. A new species of Chasmosaurus(Dinosauria: Ceratopsia) from the Dinosaur Park Formation of southern Alberta. Canadian Journal of Earth Sciences 38: 1423–1438.
• Horner, J.R. and Goodwin, M.B. 2008. Ontogeny of cranial epi−ossifications in Triceratops. Journal of Vertebrate Paleontology 28: 134–144.
• Hunt, R. and Farke, A. 2010. Behavioral interpretations from ceratopsid bonebeds. In: M.J. Ryan, B.J. Chinnery−Allgeier, and D.A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, 447–455. Indiana University Press, Bloomington.
• Kirkland, J.I. and DeBlieux, D.D. 2010. New basal centrosaurine ceratopsian skulls from the Wahweap Formation (middle Campanian), Grand Staircase–Escalante National Monument, southern Utah. In: M.J. Ryan, B.J. Chinnery−Allgeier, and D.A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, 117–140. Indiana University Press, Bloomington.
• Lambe, L.M. 1902. New genera and species from the Belly River series (mid−Cretaceous). Contributions to Canadian Palaeontology 3, Pt. 2: 23–81.
• Lambe, L.M. 1913. A new genus and species of Ceratopsia from the Belly River Formation of Alberta. The Ottawa Naturalist 27: 109–116.
• Lambe, L.M. 1915. On Eoceratops canadensis, gen. nov., with remarks on other genera of Cretaceous horned dinosaurs. Canada Department of Mines Geological Survey Museum Bulletin 12: 1–49.
• Longrich, N.R. 2010. Mojoceratops perifania, a new chasmosaurine ceratopsid from the late Campanian of western Canada. Journal of Paleontology 84: 681–694.
• Marsh, O.C. 1888. A new family of horned dinosaurs from the Cretaceous. American Journal of Science 36: 477–478.
• Marsh, O.C. 1890. Additional characters of the Ceratopsidae, with notice of new Cretaceous dinosaurs.American Journal of Science 39: 418–426.
• Owen, R. 1842. Report on British Fossil Reptiles. Part II. Report of the British Association for the Advancement of Science 11: 60–204.
• Paul, G.S., and Christiansen, P. 2000. Forelimb posture in neoceratopsian dinosaurs: implications for gait and locomotion.Paleobiology 26: 450–465.
• Rega, R., Holmes, R., and Tirbasso, A. 2010. Habitual locomotor behavior inferred from manual pathology in two Late Cretaceous chasmosaurine ceratopsid dinosaurs, Chasmosaurus irvinensis (CMN 41357) and Chasmosaurus belli (ROM 843). In: M. Ryan, B. Chinnery−Allgeier, and D. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, 340–354. Indiana University Press, Bloomington.
• Ryan, M., Eberth, D., Brinkman, D., Currie, P., and Tanke, D. 2010. A new Pachyrhinosaurus−like ceratopsid from the upper Dinosaur Park Formation (late Campanian) of southern Alberta, Canada In: M. Ryan, B. Chinnery−Allgeier, and D.A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, 141–155. Indiana University Press, Bloomington.
• Ryan, M.J. 2007. A new basal centrosaurine ceratopsid from the Oldman Formation, southeastern Alberta. Journal of Paleontology 81: 376–396.
• Ryan, M.J. and Evans, D. 2005. Review of the Ornithischia of Dinosaur Provincial Park. In: P.J. Currie and E.B. Koppelhus (eds.), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed, 313–348. Indiana University Press, Bloomington.
• Ryan, M.J. and Russell, A.P. 2005. A new centrosaurine ceratopsid from the Oldman Formation of Alberta and its implications for centrosaurine taxonomy and systematics. Canadian Journal of Earth Sciences 42: 1369–1387.
• Ryan, M.J., Holmes, R., and Russell, A.P. 2007. A revision of the late Campanian centrosaurine ceratopsid genus Styracosaurus from the Western Interior of North America. Journal of Vertebrate Paleontology 27: 944–962.
• Sampson, S.D. 1995. Two new horned dinosaurs from the Upper Cretaceous Two Medicine Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae). Journal of Vertebrate Paleontology 15: 743–760.
• Sampson, S.D. 1997. Dinosaur courtship and combat. In: J.O. Farlow and M.K. Brett−Surman, (eds.), The Complete Dinosaur, 383–393. Indiana University Press, Bloomington.
• Sampson, S.D., Ryan, M.J., and Tanke, D.H. 1997. Craniofacial ontogeny in centrosaurine dinosaurs (Ornithischia: Ceratopsidae): taxonomic and behavioral implications. Zoological Journal of the Linnean Society 121: 293–337.
• Seeley, H.G. 1887. On the classification of the fossil animals commonly named Dinosauria. Proceedings of the Royal Society of London 43: 165–171.
• Sternberg, C.M. 1950. Pachyrhinosaurus canadensis, representing a new family of the Ceratopsia, from southern Alberta. National Museum of Canada Bulletin 118: 109–120.
• Swofford, D.L. 2003. PAUP*. Phylogenetic Analysis Using Parsimony (*and Other Methods). Version 4b10. Sinauer Associates, Sunderland, Massachusetts.
• Tanke, D.H. 2010. Ceratopsian discoveries and work in Alberta, Canada: historical review and census. In: M. Ryan, B. Chinnery−Allgeier, and D.A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, CD−ROM supplement. Indiana University Press, Bloomington.
• Thompson, S. and Holmes, R. 2007. Forelimb stance and step cycle in Chasmosaurus irvinensis(Dinosauria: Neoceratopsia). Palaeontologia Electronica 10 (1), 5A: 1–17.
• Thorley, J.L. and Page, R.D.M. 2000. RadCon: phylogenetic tree comparison and consensus. Bioinformatics 16: 486–487.
• Wilkinson, M. 1995. Coping with abundant missing entries in phylogenetic inference using parsimony. Systematic Biology 44: 501–514.
• Xu, X., Wang, K., Zhao, X., and Li, D. 2010. First ceratopsid dinosaur from China and its biogeographical implications. Chinese Science Bulletin 55: 1631–1635.