New psittacosaurid highlights skull enlargement in homed dinosaurs
文献类型：期刊论文
| 作者 | Sereno, Paul C.; Zhao Xijin; Brown, Lorin; Lin, Tan; Sereno, PC (reprint author), Univ Chicago, Dept Organismal Biol & Anat, 1027 E 57th St, Chicago, IL 60637 USA. |
| 刊名 | ACTA PALAEONTOLOGICA POLONICA
 |
| 出版日期 | 2007-06-01 |
| 卷号 | 52期号:2页码:275-284 |
| 关键词 | Dinosauria Ornithischia Marginocephalia Psittacosaurus Cretaceous Yixian Formation China |
| ISSN号 | 0567-7920 |
| 文献子类 | Article |
| 英文摘要 | A new psittacosaurid is based on a nearly complete articulated skeleton from northeastern China that differs principally in skull size as compared to the most common and widespread species, Psittacosaurus mongolielisis. The skull of Psittacosauris major sp. nov., is 25% larger despite very similar postcranial skeletal dimensions. Such selective skull enlargement is very unusual. Skull size in ceratopsians. in general, scales with positive allometry relative to body mass: species of greater mass have proportionately larger skulls. This pattern stands in marked contrast to that for other vertebrate herbivores. in which larger-bodied species either have proportionately similar or smaller skulls relative to body mass. Larger-bodied ceratopsians evolved skulls that are 50% or more of trunk length-as measured without their expansive cranial frill. Although contemporaneous duck-billed dinosaurs also exhibit some positive allometry in the skull, skull length remains approximately 35% of trunk length. The evolution of extraordinary absolute and relative skull size among ceratopsians appears to have been driven by sexual selection and involved the tandem evolution of reduced head mobility and ail obligate quadrupedal posture.; A new psittacosaurid is based on a nearly complete articulated skeleton from northeastern China that differs principally in skull size as compared to the most common and widespread species, Psittacosaurus mongolielisis. The skull of Psittacosauris major sp. nov., is 25% larger despite very similar postcranial skeletal dimensions. Such selective skull enlargement is very unusual. Skull size in ceratopsians. in general, scales with positive allometry relative to body mass: species of greater mass have proportionately larger skulls. This pattern stands in marked contrast to that for other vertebrate herbivores. in which larger-bodied species either have proportionately similar or smaller skulls relative to body mass. Larger-bodied ceratopsians evolved skulls that are 50% or more of trunk length-as measured without their expansive cranial frill. Although contemporaneous duck-billed dinosaurs also exhibit some positive allometry in the skull, skull length remains approximately 35% of trunk length. The evolution of extraordinary absolute and relative skull size among ceratopsians appears to have been driven by sexual selection and involved the tandem evolution of reduced head mobility and ail obligate quadrupedal posture. |
| WOS关键词 | NEW-MEXICO ; RECONSTRUCTION ; ORNITHISCHIA ; EVOLUTION ; SKELETAL ; ALBERTA ; CHINA ; SIZE |
| WOS研究方向 | Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000247807800004 |
| 公开日期 | 2013-11-27 |
| 源URL | [http://119.78.100.205/handle/311034/3348]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | Sereno, PC (reprint author), Univ Chicago, Dept Organismal Biol & Anat, 1027 E 57th St, Chicago, IL 60637 USA. |
| 作者单位 | 1.Univ Chicago, Dept Organismal Biol & Anat, Chicago, IL 60637 USA 2.Acad Sinica, Inst Vertebrate Paleontol & Paleonanthropol, Beijing 100044, Peoples R China 3.Long Hao Geol & Paleontol Res Ctr, Bur Land & Resources, Hohhot 010010, Nei Mongol, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sereno, Paul C.,Zhao Xijin,Brown, Lorin,et al. New psittacosaurid highlights skull enlargement in homed dinosaurs[J]. ACTA PALAEONTOLOGICA POLONICA,2007,52(2):275-284. |
| APA | Sereno, Paul C.,Zhao Xijin,Brown, Lorin,Lin, Tan,&Sereno, PC .(2007).New psittacosaurid highlights skull enlargement in homed dinosaurs.ACTA PALAEONTOLOGICA POLONICA,52(2),275-284. |
| MLA | Sereno, Paul C.,et al."New psittacosaurid highlights skull enlargement in homed dinosaurs".ACTA PALAEONTOLOGICA POLONICA 52.2(2007):275-284. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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