首页> 外文期刊>Scottish Journal of Geology >First and most northern occurrence of a thalattosuchian crocodylomorph from the Jurassic of the Isle of Skye, Scotland
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First and most northern occurrence of a thalattosuchian crocodylomorph from the Jurassic of the Isle of Skye, Scotland

机译:来自苏格兰斯凯岛的侏罗纪的侏罗纪的第一个也是最北方的北方鳄鱼群

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摘要

The Jurassic was a key interval for the evolution of dinosaurs, crocodylomorphs and many other vertebrate groups. In recent years, new vertebrate fossils have emerged from the Early-Middle Jurassic of the Isle of Skye, Scotland; however, much more is known about Skye's dinosaur fauna than its crocodylomorphs. Here we report new crocodylomorph material collected from Jurassic marine deposits at Prince Charlie's Cave on the NE coast of Skye. The specimen is a small cobble containing postcranial elements from an individual that is considerably larger in size than previous crocodylomorphs described from Skye. Based on features of the vertebrae and osteoderms, the specimen is assigned to Thalattosuchia, an extinct clade of semi-aquatic/pelagic crocodylomorphs. Specifically, the sub-circular and bean-shaped pit ornamentation on the dorsal surface of the osteoderms in alternating rows suggests affinities with the semi-aquatic lineage Teleosauroidea. Although the ornamentation pattern on the osteoderms is most similar to Macrospondylus ('Steneosaurus') bollensis, we conservatively assign the specimen to Teleosauroidea indeterminate. Regardless of its precise affinities and fragmentary nature, the specimen is the first thalattosuchian discovered in Scotland and is the most northerly reported Jurassic thalattosuchian globally, adding to our understanding of the palaeobiogeography and evolution of this group.
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  • 来源
    《Scottish Journal of Geology》 |2021年第1期|共13页
  • 作者单位

    Univ Edinburgh Grant Inst Sch Geosci Kings Bldg James Hutton Rd Edinburgh EH9 3FE Midlothian Scotland;

    Natl Museums Scotland Chambers St Edinburgh EH1 1JF Midlothian Scotland;

    Univ Edinburgh Grant Inst Sch Geosci Kings Bldg James Hutton Rd Edinburgh EH9 3FE Midlothian Scotland;

    Univ Edinburgh Grant Inst Sch Geosci Kings Bldg James Hutton Rd Edinburgh EH9 3FE Midlothian Scotland;

    Dent Dirket Spenge Germany;

    Univ Edinburgh Grant Inst Sch Geosci Kings Bldg James Hutton Rd Edinburgh EH9 3FE Midlothian Scotland;

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  • 正文语种 eng
  • 中图分类 地质学;
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