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A Glyptosaurine Lizard from the Eocene (late Uintan) of San Diego, California, and Implications for Glyptosaurine Evolution and Biogeography.

机译:加利福尼亚圣地亚哥始新世(Uintan晚期)的Glyptosaurine蜥蜴及其对Glyptosaurine进化和生物地理学的启示

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摘要

Glyptosaurine lizards (family Anguidae) are known exclusively from the Paleogene of North America and Eurasia. In North America these lizards are largely restricted to the intermontane basins along the Rocky Mountains, with only sparse, indeterminately-identified skeletal elements known from outside of this region. In this study I describe a new specimen assignable to G. sylvestris, notable for being recovered from the late Uintan of the Santiago Formation in southern California, significantly outside the known geographic range of well-preserved glyptosaurine fossils. The presence of Glyptosaurus in southern California at a time of widespread geographic change and regional endemism in mammalian faunas, when also considering the results other studies of Eocene lizards, indicates a pattern of evolution for lizards different from the turnovers and regional restrictions observed in mammals. The specimen described here shows features consistent with ontogenetic variation and may help to provide insight into the life history of glyptosaurine lizards.
机译:雕龙蜥蜴(Anguidae家族)仅从北美和欧亚大陆的古近系已知。在北美,这些蜥蜴主要被限制在落基山脉沿岸的山间盆地,只有稀疏的,不确定地确定的骨骼元素才在该地区以外发现。在这项研究中,我描述了一个新的标本,隶属于樟子松(G. sylvestris),该标本是从加利福尼亚南部的圣地亚哥组的已故Uintan回收的,明显超出了保存完好的草形翼龙化石的已知地理范围。在考虑到始新世蜥蜴的其他研究结果的同时,考虑到始新世蜥蜴的其他研究结果,在哺乳动物分布广泛的地理变化和区域特有性的同时,加利福尼亚南部存在剑突,这表明蜥蜴的进化模式与哺乳动物的营业额和区域限制不同。这里描述的标本显示出与个体发育变异相一致的特征,并可能有助于深入了解Glyptosaurine蜥蜴的生活史。

著录项

  • 作者

    Moscato, David A.;

  • 作者单位

    East Tennessee State University.;

  • 授予单位 East Tennessee State University.;
  • 学科 Paleontology.;Geobiology.
  • 学位 M.S.
  • 年度 2013
  • 页码 64 p.
  • 总页数 64
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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