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

  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},
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… 


Histological observations of Enantiornithine bone (Saurischia, Aves) from the Lower Cretaceous of Las Hoyas (Spain)
A mid-Cretaceous enantiornithine (Aves) hatchling preserved in Burmese amber with unusual plumage
First species of Enantiornithes from Sihedang elucidates skeletal development in Early Cretaceous enantiornithines
The Sihedang locality of the Lower Cretaceous Yixian Formation is the only recognized ornithuromorph-dominated locality in the Jehol Group of north-eastern China and a new taxon Monoenantiornis sihedangia is erected, consistent with the pattern of ossification that occurs in neornithines.
Bone histology of Azendohsaurus laaroussii: Implications for the evolution of thermometabolism in Archosauromorpha
A parsimony optimization of the presence of endothermy on a phylogenetic tree of tetrapods shows that this derived character state was acquired by the last common ancestor of the clade Azendohsaurus–Archosauriformes and that there is a reversion in Crocodylia.
Osteohistology and Life History of the Basal Pygostylian, Confuciusornis sanctus
It is shown that although fibrolamellar bone is widespread across birds, the extent and duration of this rapid phase of bone deposition is highly variable and comparisons among Mesozoic birds confirm that early ontogenetic growth was rapid, but that later post‐hatching growth was strongly influenced by the ontogenetics age of the individual, body size, and local environment, as well as taxonomy.
Life History of Rhamphorhynchus Inferred from Bone Histology and the Diversity of Pterosaurian Growth Strategies
The initial rapid growth phase early in Rhamphorhynchus ontogeny supports the non-volant nature of its hatchlings, and refutes the widely accepted ‘superprecocial hatchling’ hypothesis.
The First Enantiornithine Bird from the Upper Cretaceous of China
Histological study shows that the bones of Parvavis were composed of parallelfibered bone tissue without lines of arrested growth, and indicated that growth rate had slowed but had not stopped at any stage prior to death, and the new bird was probably close to adult body size at the time of death.
Bone growth marks reveal protracted growth in New Zealand kiwi (Aves, Apterygidae)
It is shown that Kiwis take 5–6 years to reach full adult body size, which indicates a delayed maturity and a slow reproductive cycle, and cyclical growth in modern birds probably evolved convergently in moa and kiwi sometime since the Middle Miocene.
Were Notosuchia (Pseudosuchia: Crocodylomorpha) warm-blooded? A palaeohistological analysis suggests ectothermy
Analysis of quantitative bone palaeohistology and phylogenetic eigenvector maps suggest that the seven species of Notosuchia sampled in this study were ectotherms, and parsimony suggests that endothermy may have been lost at the node Metasuchia (Notosuchian–Neosuchio) by the Early Jurassic.