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Spinosaurus (/ ˌ s p aɪ n ə ˈ s ɔːr ə s /; lit. ' spine lizard ') is a genus of spinosaurid dinosaur that lived in what now is North Africa during the Cenomanian stage of the Late Cretaceous period, about 100 to 94 million years ago. The genus was known first from Egyptian remains discovered in 1912 and described by German ...
English: A size comparison of various specimens of the theropod dinosaur genus Spinosaurus. References: Ibrahim, Nizar & Sereno, Paul & Dal Sasso, Cristiano & Maganuco, Simone & Fabbri, Matteo & Martill, David & Zouhri, Samir & Myhrvold, Nathan & Iurino, Dawid. (2014). Semiaquatic adaptations in a giant predatory dinosaur.
Articles related to the Spinosauridae, a clade or family of tetanuran theropod dinosaurs comprising ten to seventeen known genera.Spinosaurid fossils have been recovered worldwide, including Africa, Europe, South America and Asia.
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This revelation leads to the diagnostic value of positionally variable cervical vertebral characters in spinosaurid systematics is discussed. However, according to the authors, the vertebrae could also show that there was more variation in the neck of Spinosaurus and the authors cautioned that more material is necessary to draw a conclusion. [20]
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Spinosauroidea was defined as a clade in 1998 by Paul Sereno as the node clade containing the common ancestor of Spinosaurus and Torvosaurus and all its descendants. Thomas Holtz in 2004 defined a branch clade with the same name containing all species closer to Spinosaurus than to Passer domesticus .
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