Cortical growth marks reveal extended juvenile development in New Zealand moa

@article{Turvey2005CorticalGM,
  title={Cortical growth marks reveal extended juvenile development in New Zealand moa},
  author={Samuel T. Turvey and Owen R. Green and Richard N. Holdaway},
  journal={Nature},
  year={2005},
  volume={435},
  pages={940-943}
}
Cyclical growth marks in cortical bone, deposited before attainment of adult body size, reflect osteogenetic changes caused by annual rhythms and are a general phenomenon in non-avian ectothermic and endothermic tetrapods. However, the growth periods of ornithurines (the theropod group including all modern birds) are usually apomorphically shortened to less than a year, so annual growth marks are almost unknown in this group. Here we show that cortical growth marks are frequent in long bones of… Expand
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