Gender-specific reproductive tissue in ratites and Tyrannosaurus rex

被引：111

作者：

Schweitzer, MH ^{[1
]}

Wittmeyer, JL

Horner, JR

机构：

[1] N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA

[2] N Carolina State Museum Nat Sci, Raleigh, NC 27601 USA

[3] Montana State Univ, Museum Rockies, Bozeman, MT 59717 USA

来源：

SCIENCE | 2005年 / 308卷 / 5727期

关键词：

D O I：

10.1126/science.1112158

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 Tyrannosaurus rex (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.

引用

页码：1456 / 1460

页数：5

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