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- Mary H. Schweitzer
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA.
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- Jennifer L. Wittmeyer
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA.
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- John R. Horner
- Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA.
書誌事項
- 公開日
- 2005-06-03
- DOI
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- 10.1126/science.1112158
- 公開者
- American Association for the Advancement of Science (AAAS)
この論文をさがす
説明
<jats:p> Unambiguous indicators of gender in dinosaurs are usually lost during fossilization, along with other aspects of soft tissue anatomy. We report the presence of endosteally derived bone tissues lining the interior marrow cavities of portions of <jats:italic>Tyrannosaurus rex</jats:italic> (Museum of the Rockies specimen number 1125) hindlimb elements, and we hypothesize that these tissues are homologous to specialized avian tissues known as medullary bone. Because medullary bone is unique to female birds, its discovery in extinct dinosaurs solidifies the link between dinosaurs and birds, suggests similar reproductive strategies, and provides an objective means of gender differentiation in dinosaurs. </jats:p>
収録刊行物
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- Science
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Science 308 (5727), 1456-1460, 2005-06-03
American Association for the Advancement of Science (AAAS)