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A giant tyrannosaur from the Campanian-Maastrichtian of southern North America and the evolution of tyrannosaurid gigantism.
Dalman, Sebastian G; Loewen, Mark A; Pyron, R Alexander; Jasinski, Steven E; Malinzak, D Edward; Lucas, Spencer G; Fiorillo, Anthony R; Currie, Philip J; Longrich, Nicholas R.
Afiliação
  • Dalman SG; New Mexico Museum of Natural History and Science, 1801 Mountain Road N.W., Albuquerque, NM, 87104, USA.
  • Loewen MA; Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, USA.
  • Pyron RA; Natural History Museum of Utah, University of Utah, Salt Lake City, UT, USA.
  • Jasinski SE; Department of Biological Sciences, The George Washington University, 2023 G St. NW, Washington, DC, 20052, USA.
  • Malinzak DE; Department of Environmental Science and Sustainability, Harrisburg University, 326 Market Street, Harrisburg, PA, 17101, USA.
  • Lucas SG; Pennsylvania State University, Lehigh Valley, Center Valley, PA, 18034, USA.
  • Fiorillo AR; New Mexico Museum of Natural History and Science, 1801 Mountain Road N.W., Albuquerque, NM, 87104, USA.
  • Currie PJ; New Mexico Museum of Natural History and Science, 1801 Mountain Road N.W., Albuquerque, NM, 87104, USA.
  • Longrich NR; Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada.
Sci Rep ; 13(1): 22124, 2024 01 11.
Article em En | MEDLINE | ID: mdl-38212342
ABSTRACT
Tyrannosaurid dinosaurs dominated as predators in the Late Cretaceous of Laurasia, culminating in the evolution of the giant Tyrannosaurus rex, both the last and largest tyrannosaurid. Where and when Tyrannosaurini (T. rex and kin) originated remains unclear. Competing hypotheses place tyrannosaurin origins in Asia, or western North America (Laramidia). We report a new tyrannosaurin, Tyrannosaurus mcraeensis, from the Campanian-Maastrichtian Hall Lake Formation of New Mexico, based on a fossil previously referred to T. rex. T. mcraeensis predates T. rex by ~ 6-7 million years, yet rivaled it in size. Phylogenetic analysis recovers T. mcraeensis as sister to T. rex and suggests Tyrannosaurini originated in southern Laramidia. Evolution of giant tyrannosaurs in southern North America, alongside giant ceratopsians, hadrosaurs, and titanosaurs suggests large-bodied dinosaurs evolved at low latitudes in North America.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Dinossauros / Gigantismo Limite: Animals País/Região como assunto: America do norte Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Dinossauros / Gigantismo Limite: Animals País/Região como assunto: America do norte Idioma: En Ano de publicação: 2024 Tipo de documento: Article