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Mass Scan of Museum Specimens Uncovers Widespread Osteoderms in Goannas

Cutting-edge micro-CT scans of century-old museum specimens show nearly half of all lizard species carry hidden dermal armour.

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Overview

  • Researchers performed the first global micro-CT survey of squamate skin bones, examining almost 2,000 specimens from collections in Australia, Europe and the United States.
  • Roy Ebel and colleagues documented osteoderms in 29 Australo-Papuan monitor lizard species for the first time, a fivefold increase among goannas.
  • The study reveals dermal bone structures in about 46% of lizard species worldwide, marking an 85% rise over earlier estimates.
  • Scientists propose that osteoderms support protection, thermoregulation, enhanced mobility and calcium storage during reproduction.
  • Published in the Zoological Journal of the Linnean Society, the comprehensive osteoderm catalogue lays groundwork for new evolutionary and biomimetic research.