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The Dinosauria$
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David Weishampel

Print publication date: 2004

Print ISBN-13: 9780520242098

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520242098.001.0001

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(p.111) Five Tyrannosauroidea
The Dinosauria

Thomas R. Holtz

University of California Press

Tyrannosauroids are among the most distinctive and best known of Mesozoic theropods. Diagnostic skeletal material for Tyrannosauridae is at present limited to the last part of the Late Cretaceous of eastern and central Asia (China and Mongolia) and North America; the more inclusive Tyrannosauroidea includes taxa from the Late Jurassic of Europe and North America and the Early Cretaceous of Europe and Asia. Tyrannosaurids include some of the largest known theropod taxa (up to 13 m long and weighing six or more tonnes). The five most completely known species (Tyrannosaurus rex, Tarbosaurus bataar, Daspletosaurus torosus, Albertosaurus sarcophagus, and Gorgosaurus libratus) are all represented by individuals with femora more than 100 cm in length, reaching 138 cm in the largest Tyrannosaurus rex.

Keywords:   Tyrannosauroids, Tyrannosauridae, Tyrannosaurus rex, Tarbosaurus bataar, Daspletosaurus torosus, Albertosaurus sarcophagus, Gorgosaurus libratus

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