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Oviraptorid dinosaurs from southern China.

机译：来自中国南方的锯齿类恐龙。

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摘要

Heyuannia huangi Lu, 2003 from the Late Cretaceous of Southern China is described in detail. The revised diagnosis of Heyuannia huangi includes the following characters: quadratojugal articular surface of the quadrate groove-like, the quadrate diverticulum entering the quadrate anterolaterally, metacarpal I wrapped around metacarpal II proximally, pneumatic foramina present on the neural arches and ribs of cervical vertebrae, the angle between the scapula and coracoid approximately 145°, the ratio of coracoid length to scapular length approximately 0.35, the pubis as long as ischium, and the ratio of femur length to tibia length 0.8. Two new oviraptorids from the Nanxiong Basin are also described. A phylogenetic analysis was carried out in two parts. The first phylogenetic analysis is to test the systematic position of Oviraptorosauria among ceolurosaurid dinosaurs. This analysis shows that Oviraptorosauria form a monophyletic group. Incisivosaurus gauthieri is the most basal oviraptorosaur and Caudipteryx is the second most primitive form. Alvarezsauridae is a sister group to TO (Therizinosauriodea and Oviraptorosauria). Within this more inclusive analysis (among Ceolurosauria), all the derived forms of Oviraptorosauria (excluding the primitive forms such as Incisivosaurus gauthieri and Caudipteryx zoui) form an unresolved polytomy. The second analysis is to determine the interrelationships among oviraptorosaurs. This less inclusive analysis (only a few groups of Ceolurosauria were employed for analysis) allows better resolution within Oviraptorosauria. The analysis shows that all oviraptorosaurs form a monophyletic group, Incisivosaurus gauthieri is the most basal oviraptotosaur, Caudipteryx zoui is the second most primitive form and Avimimus portentosus is basal to the derived oviraptorosaurs. The two new taxa from Nanxiong Basin are not nested within same clade. Shixinggia oblita may be the first caenagnathid oviraptorosaur found from southern China.; Some small maniraptoran dinosaurs independently acquire avian characters, including Microraptor zhaoianus, Microraptor gui (basal dromaeosaurids), Caudipteryx zoui (a basal oviraptorosaur), Sinovenator changii (a basal troodontid), Beipiaosaurus inexpectus (therizinosaur) and alvarezsaurids. The derived oviraptorosaurs independently attained more avian characters both in the skull and postcranial skeleton than other theropod dinosaurs did. Some of the morphologies present in derived oviraptorosaurs parallel modern ratites.
机译：详细描述了华南晚白垩世的Heyuannia huangi Lu，2003年。修订后的《河源氏黄皮病诊断》包括以下特征：四边形的四方丘状关节面，四角形憩室从前侧进入四边形，掌骨I缠绕在掌骨II的近端，气孔上孔存在于颈椎的神经弓和肋骨，肩cap骨和喙骨之间的角度约为145°，喙骨长度与肩骨长度的比率约为0.35，耻骨与坐骨一样长，股骨长度与胫骨长度的比率为0.8。还描述了来自南雄盆地的两个新的卵生动物卵。系统发育分析分为两个部分。首次系统发育分析是为了检验尖嘴龙科恐龙中尖嘴龙的系统位置。该分析表明卵形尿尿症形成了单系统群。尖齿龙是最基础的甲龙，而胸鳍是第二个最原始的形式。 Alvarezsauridae是TO的姐妹群体（Therizinosauriodea和Oviraptorosauria）。在这种更具包容性的分析中（在蛇骨龙眼中），卵形龙的所有派生形式（不包括原始的形式，如尖齿蛇龙和Caudipteryx zoui）都形成了一个未解决的多形体。第二种分析是确定卵龙之间的相互关系。这种较少包容性的分析（仅使用少数鳞翅类动物进行分析）可以更好地分辨卵形尿症。分析表明，所有的锯齿龙都构成一个单一的类群，尖齿食龙是最基础的锯齿龙，Caudipteryx zoui是第二个最原始的形态，而尖齿蛇蝎是衍生的锯齿龙的基础。来自南雄盆地的两个新分类单元没有嵌套在同一进化枝中。东北狮（Shixinggia oblita）可能是从中国南部发现的第一个冠状棘突龙。一些小型的Maniraptoran恐龙独立地获得了鸟类特征，包括Microraptor zhaoianus，Microraptor gui（基棘突龙），Caudipteryx zoui（基棘突龙），Sinovenator changii（基棘齿龙），Beipiaosaurus inexpectus（therizinus）。与其他兽脚类恐龙相比，衍生的拟兽龙在头骨和颅后骨骼中均独立获得了更多的鸟类特征。存在于衍生的拟兽龙中的一些形态与现代平胸兽平行。

著录项

  • 作者

    Lu, Junchang.;

  • 作者单位

    Southern Methodist University.;

  • 授予单位 Southern Methodist University.;
  • 学科 Paleontology.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 265 p.
  • 总页数 265
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 古生物学;
  • 关键词

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