Callibrachion and Datheosaurus, Two Historical and Previously Mistaken Basal Caseasaurian Synapsids from Europe

@article{Spindler2015CallibrachionAD,
  title={Callibrachion and Datheosaurus, Two Historical and Previously Mistaken Basal Caseasaurian Synapsids from Europe},
  author={Frederik Spindler and Jocelyn Falconnet and J{\"o}rg Fr{\"o}bisch},
  journal={Acta Palaeontologica Polonica},
  year={2015},
  volume={61},
  pages={597 - 616}
}
This study represents a re-investigation of two historical fossil discoveries, Callibrachion gaudryi (Artinskian of France) and Datheosaurus macrourus (Gzhelian of Poland), that were originally classified as haptodontine-grade sphenacodontians and have been lately treated as nomina dubia. Both taxa are here identified as basal caseasaurs based on their overall proportions as well as dental and osteological characteristics that differentiate them from any other major synapsid subclade. As a… 

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