Palaeohistological inferences of resting metabolic rates in Concornis and Iberomesornis (Enantiornithes, Ornithothoraces) from the Lower Cretaceous of Las Hoyas (Spain)

@article{Cubo2021PalaeohistologicalIO,
  title={Palaeohistological inferences of resting metabolic rates in Concornis and Iberomesornis (Enantiornithes, Ornithothoraces) from the Lower Cretaceous of Las Hoyas (Spain)},
  author={Jorge Cubo and {\'A}ngela D. Buscalioni and Lucas J. Legendre and Estelle Bourdon and Jos{\'e} Luis Sanz and Armand J. de Ricql{\`e}s},
  journal={Palaeontology},
  year={2021},
  volume={65}
}
The bone histology of non‐avian theropods such as Troodon, early pygostylians such as Confuciusornis, and neornithines, is characterized by the post‐hatching formation of fibrolamellar complex. In contrast, the cortex of enantiornithine birds, like Concornis and Iberomesornis, is made of poorly vascularized parallel‐fibred tissue. The cortex of metatarsals of Concornis lacustris MCCM‐LH21006 is composed of a thin layer of lamellar endosteal bone and a thick layer of almost avascular parallel… 

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