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Title: A diminutive perinate European Enantiornithes reveals an asynchronous ossification pattern in early birds

Journal Article · · Nature Communications
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [6]; ORCiD logo [6];  [7]; ORCiD logo [8]; ORCiD logo [9];  [10]; ORCiD logo [11]; ORCiD logo [8]; ORCiD logo [11]
  1. ARAID—Fundacion Conjunto Paleontologico de Teruel-Dinopolis, Teruel (Spain); Univ. of Manchester (United Kingdom). School of Earth and Environmental Sciences
  2. Natural History Museum of Los Angeles County, Los Angeles, CA (United States). Dinosaur Inst.
  3. Uppsala Univ. (Sweden). Dept. of Organismal Biology; European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  4. Univ. of Manchester (United Kingdom). School of Earth and Environmental Sciences; Natural History Museum, London (United Kingdom). Dept. of Earth Sciences
  5. Univ. of Manchester (United Kingdom). School of Earth and Environmental Sciences; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  6. Univ. of Manchester (United Kingdom). School of Earth and Environmental Sciences
  7. Univ. of Manchester (United Kingdom). School of Earth and Environmental Sciences; College of Charleston, Charleston, SC (United States). Dept. of Geology and Environmental Geosciences
  8. Univ. Nacional de Educacion a Distancia, Madrid (Spain)
  9. Natural History Museum of Los Angeles County, Los Angeles, CA (United States). Dinosaur Inst.; Univ. de Malaga, Malaga (Spain)
  10. Natural History Museum of Los Angeles County, Los Angeles, CA (United States). Dinosaur Inst.; Univ. Autonoma de Madrid (Spain). Facultad de Ciencias
  11. Univ. Autonoma de Madrid (Spain). Facultad de Ciencias

Fossils of juvenile Mesozoic birds provide insight into the early evolution of avian development, however such fossils are rare. The analysis of the ossification sequence in these early-branching birds has the potential to address important questions about their comparative developmental biology and to help understand their morphological evolution and ecological differentiation. Here we report on an early juvenile enantiornithine specimen from the Early Cretaceous of Europe, which sheds new light on the osteogenesis in this most species-rich clade of Mesozoic birds. Consisting of a nearly complete skeleton, it is amongst the smallest known Mesozoic avian fossils representing post-hatching stages of development. Finally, comparisons between this new specimen and other known early juvenile enantiornithines support a clade-wide asynchronous pattern of osteogenesis in the sternum and the vertebral column, and strongly indicate that the hatchlings of these phylogenetically basal birds varied greatly in size and tempo of skeletal maturation.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; European Union (EU)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1437354
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (7)

Osteohistology and Life History of the Basal Pygostylian, Confuciusornis sanctus journal November 2019
Avian tail ontogeny, pygostyle formation, and interpretation of juvenile Mesozoic specimens journal June 2018
A fully feathered enantiornithine foot and wing fragment preserved in mid-Cretaceous Burmese amber journal January 2019
Fully fledged enantiornithine hatchling revealed by Laser-Stimulated Fluorescence supports precocial nesting behavior journal March 2019
An unusual bird (Theropoda, Avialae) from the Early Cretaceous of Japan suggests complex evolutionary history of basal birds journal November 2019
Avian palaeoneurology: Reflections on the eve of its 200th anniversary journal January 2020
Dinosaur paleohistology: review, trends and new avenues of investigation journal January 2019

Figures / Tables (6)