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Fossil reveals early reptiles used rib muscles to breathe efficiently.
A 289-million-year-old mummified reptile fossil from Oklahoma provides the earliest direct evidence of rib-powered breathing in vertebrates.
The discovery reveals a complex chest assembly in a small lizard-like creature, showing that early amniotes used rib muscles to ventilate their lungs.
This adaptation enabled more efficient respiration and likely contributed to the evolutionary success of reptiles, birds, and mammals.
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Los fósiles revelan que los primeros reptiles usaban los músculos de las costillas para respirar de manera eficiente.