T. Williamson

Publications78
h-index17
Citations1,369
Highly Influential Citations208
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Strong and weak convergence of the sequence of successive approximations for quasi-nonexpansive mappings
is well-defined, the purpose of this paper is to obtain conditions, as general as possible, on T, D, and X which would guarantee the convergence (i.e., the strong convergence) and, under weaker… Expand
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3. Paleocene Biochronology: The Puercan Through Clarkforkian Land Mammal Ages
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A NEW GENUS AND SPECIES OF TYRANNOSAUROID FROM THE LATE CRETACEOUS (MIDDLE CAMPANIAN) DEMOPOLIS FORMATION OF ALABAMA
Abstract The discovery of a new genus and species of tyrannosauroid from the Demopolis Formation (middle Campanian) of Alabama increases the known diversity of the clade, although it does not… Expand
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Diversity of late Maastrichtian Tyrannosauridae (Dinosauria: Theropoda) from western North America
The tooth taxon Aublysodon mirandus was reinstated following the collection of nondenticulate tyrannosaurid premaxillary teeth from late Maastrichtian deposits in western North America. A small skull… Expand
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A NEW GENUS OF DERIVED PACHYCEPHALOSAURIAN FROM WESTERN NORTH AMERICA
Abstract Pachycephalosaurian specimens from the Upper Cretaceous (upper Campanian) Kirtland Formation of northwestern New Mexico include a partial skull that preserves much of the basicranium. It… Expand
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The origin and early evolution of metatherian mammals: the Cretaceous record
Abstract Metatherians, which comprise marsupials and their closest fossil relatives, were one of the most dominant clades of mammals during the Cretaceous and are the most diverse clade of living… Expand
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THE SYSTEMATIC UTILITY OF THEROPOD ENAMEL WRINKLES
STEPHEN L. BRUSATTE,*'1 ROGER B. J. BENSON,2 THOMAS D. CARR,3 THOMAS E. WILLIAMSON,4 and PAUL C. SERENO5; 1Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road,… Expand
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Bistahieversor sealeyi, gen. et sp. nov., a New Tyrannosauroid from New Mexico and the Origin of Deep Snouts in Tyrannosauroidea
Skeletal remains of Late Cretaceous (Campanian and Maastrichtian) tyrannosauroids are rare in southwestern North America (Carr and Williamson, 2000). Historically, the identity and diversity of… Expand
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The phylogeny and evolution of Cretaceous–Palaeogene metatherians: cladistic analysis and description of new early Palaeocene specimens from the Nacimiento Formation, New Mexico
Metatherian mammals were the most diverse mammalian clade in North America through the Late Cretaceous, but they underwent a severe extinction at the Cretaceous–Palaeogene (K-Pg) boundary. In order… Expand
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?Brachychampsa sealeyi, sp nov., (Crocodylia, Alligatoroidea) from the Upper Cretaceous (lower Campanian) Menefee Formation, northwestern New Mexico
ABSTRACT ?Brachychampsa sealeyi sp. nov. is a small alligatoroid based on a partial skull, associated partial mandible, and a dorsal? osteoderm from the Upper Cretaceous (lower Campanian) Menefee… Expand
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