来自撒哈拉的白垩纪蜥脚类恐龙与恐龙骨骼进化的不均衡速率
Cretaceous sauropods from the sahara and the uneven rate of skeletal evolution among dinosaurs.
作者信息
Sereno PC, Beck AL, Dutheil DB, Larsson HC, Lyon GH, Moussa B, Sadleir RW, Sidor CA, Varricchio DJ, Wilson GP, Wilson JA
机构信息
Department of Organismal Biology and Anatomy, University of Chicago, 1027 East 57 Street, Chicago, IL 60637, USA. Laboratoire de Paleontologie-EPHE-Museum National d'Histoire Naturelle, 8 rue du Buffon, 75005 Paris, France. Project Explorati.
出版信息
Science. 1999 Nov 12;286(5443):1342-7. doi: 10.1126/science.286.5443.1342.
Lower Cretaceous fossils from central Niger document the succession of sauropod dinosaurs on Africa as it drifted into geographic isolation. A new broad-toothed genus of Neocomian age ( approximately 135 million years ago) shows few of the specializations of other Cretaceous sauropods. A new small-bodied sauropod of Aptian-Albian age ( approximately 110 million years ago), in contrast, reveals the highly modified cranial form of rebbachisaurid diplodocoids. Rates of skeletal change in sauropods and other major groups of dinosaurs are estimated quantitatively and shown to be highly variable.
来自尼日尔中部的下白垩统化石记录了非洲大陆在逐渐漂移至地理隔离状态过程中蜥脚类恐龙的演替情况。一个新的、具有尼奥克姆阶时代（约1.35亿年前）的宽齿类属，几乎没有其他白垩纪蜥脚类恐龙的特化特征。相比之下，一个新的、具有阿普第阶-阿尔比阶时代（约1.1亿年前）的小型蜥脚类恐龙，则展现出雷巴齐斯龙科梁龙类高度特化的颅骨形态。对蜥脚类恐龙和其他主要恐龙类群的骨骼变化速率进行了定量估算，结果显示其变化很大。
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