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<p>The capitosauroid genus <i>Cyclotosaurus</i> was first recognized in the Carnian Stuttgart Formation of Feuerbacher Heide at Stuttgart in the nineteenth century. A revision of the type material and the other German samples from stratigraphically younger Carnian and Norian deposits reveal numerous differences between these. Cladistic analysis of the German species plus the taxa from Poland and Greenland concurs roughly with stratigraphy, albeit with two main post-<i>C. robustus</i> lineages that date back to the Stuttgart Formation: (1) a slender-skulled clade formed by <i>C. buechneri</i> and <i>C. ebrachensis</i> and (2) a broad-skulled clade formed by <i>C. posthumus, C. naraserluki, C. intermedius</i> and <i>C. hemprichi</i>. <i>Cyclotosaurus</i> was the single apex predator in Carnian and Norian fluviatile environments.</p>

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The morphology and evolutionary history of the temnospondyl genus Cyclotosaurus with a focus on material from Germany

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月12日

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  • Rainer R. Schoch,
  • Florian Witzmann,
  • Ingmar Werneburg,
  • Ralf Werneburg,
  • Eudald Mujal,
  • Raphael Moreno

摘要

The capitosauroid genus Cyclotosaurus was first recognized in the Carnian Stuttgart Formation of Feuerbacher Heide at Stuttgart in the nineteenth century. A revision of the type material and the other German samples from stratigraphically younger Carnian and Norian deposits reveal numerous differences between these. Cladistic analysis of the German species plus the taxa from Poland and Greenland concurs roughly with stratigraphy, albeit with two main post-C. robustus lineages that date back to the Stuttgart Formation: (1) a slender-skulled clade formed by C. buechneri and C. ebrachensis and (2) a broad-skulled clade formed by C. posthumus, C. naraserluki, C. intermedius and C. hemprichi. Cyclotosaurus was the single apex predator in Carnian and Norian fluviatile environments.