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Intraskeletal histovariability, allometric growth patterns, and their functional implications in bird-like dinosaurs

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Abstract
With their elongated forelimbs and variable aerial skills, paravian dinosaurs, a clade also comprising modern birds, are in the hotspot of vertebrate evolutionary research. Inferences on the early evolution of flight largely rely on bone and feather morphology, while osteohistological traits are usually studied to explore life-history characteristics. By sampling and comparing multiple homologous fore-and hind limb elements, we integrate for the first time qualitative and quantitative osteohistological approaches to get insight into the intraskeletal growth dynamics and their functional implications in five paravian dinosaur taxa, Anchiornis, Aurornis, Eosinopteryx, Serikornis, and Jeholornis. Our qualitative assessment implies a considerable diversity in allometric/isometric growth patterns among these paravians. Quantitative analyses show that neither taxa nor homologous elements have characteristic histology, and that ontogenetic stage, element size and the newly introduced relative element precocity only partially explain the diaphyseal histovariability. Still, Jeholornis, the only avialan studied here, is histologically distinct from all other specimens in the multivariate visualizations raising the hypothesis that its bone tissue characteristics may be related to its superior aerial capabilities compared to the non-avialan paravians. Our results warrant further research on the osteohistological correlates of flight and developmental strategies in birds and bird-like dinosaurs.
Keywords
LONG-BONE HISTOLOGY, ANAS-PLATYRHYNCHOS, ALLIGATOR-MISSISSIPPIENSIS, TORSIONAL RESISTANCE, PERIOSTEAL BONE, FLAPPING FLIGHT, AMPRINOS RULE, EVOLUTION, CHINA, ADAPTATION

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Chicago
Prondvai, Edina, Pascal Godefroit, Dominique Adriaens, and Dong-Yu Hu. 2018. “Intraskeletal Histovariability, Allometric Growth Patterns, and Their Functional Implications in Bird-like Dinosaurs.” Scientific Reports 8.
APA
Prondvai, Edina, Godefroit, P., Adriaens, D., & Hu, D.-Y. (2018). Intraskeletal histovariability, allometric growth patterns, and their functional implications in bird-like dinosaurs. SCIENTIFIC REPORTS, 8.
Vancouver
1.
Prondvai E, Godefroit P, Adriaens D, Hu D-Y. Intraskeletal histovariability, allometric growth patterns, and their functional implications in bird-like dinosaurs. SCIENTIFIC REPORTS. 2018;8.
MLA
Prondvai, Edina, Pascal Godefroit, Dominique Adriaens, et al. “Intraskeletal Histovariability, Allometric Growth Patterns, and Their Functional Implications in Bird-like Dinosaurs.” SCIENTIFIC REPORTS 8 (2018): n. pag. Print.
@article{8548600,
  abstract     = {With their elongated forelimbs and variable aerial skills, paravian dinosaurs, a clade also comprising modern birds, are in the hotspot of vertebrate evolutionary research. Inferences on the early evolution of flight largely rely on bone and feather morphology, while osteohistological traits are usually studied to explore life-history characteristics. By sampling and comparing multiple homologous fore-and hind limb elements, we integrate for the first time qualitative and quantitative osteohistological approaches to get insight into the intraskeletal growth dynamics and their functional implications in five paravian dinosaur taxa, Anchiornis, Aurornis, Eosinopteryx, Serikornis, and Jeholornis. Our qualitative assessment implies a considerable diversity in allometric/isometric growth patterns among these paravians. Quantitative analyses show that neither taxa nor homologous elements have characteristic histology, and that ontogenetic stage, element size and the newly introduced relative element precocity only partially explain the diaphyseal histovariability. Still, Jeholornis, the only avialan studied here, is histologically distinct from all other specimens in the multivariate visualizations raising the hypothesis that its bone tissue characteristics may be related to its superior aerial capabilities compared to the non-avialan paravians. Our results warrant further research on the osteohistological correlates of flight and developmental strategies in birds and bird-like dinosaurs.},
  articleno    = {258},
  author       = {Prondvai, Edina and Godefroit, Pascal and Adriaens, Dominique and Hu, Dong-Yu},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keyword      = {LONG-BONE HISTOLOGY,ANAS-PLATYRHYNCHOS,ALLIGATOR-MISSISSIPPIENSIS,TORSIONAL RESISTANCE,PERIOSTEAL BONE,FLAPPING FLIGHT,AMPRINOS RULE,EVOLUTION,CHINA,ADAPTATION},
  language     = {eng},
  pages        = {16},
  title        = {Intraskeletal histovariability, allometric growth patterns, and their functional implications in bird-like dinosaurs},
  url          = {http://dx.doi.org/10.1038/s41598-017-18218-9},
  volume       = {8},
  year         = {2018},
}

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