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c0nc0rdance@c0nc0rdance.bsky.social |
We don't quite know what the spines were for. They're circular in cross-section, meaning they probably didn't support a 'sail', as in Dimetrodon's flattened spines supporting a sail structure. So several explanations for what they were "for":
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c0nc0rdance
@c0nc0rdance.bsky.social
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Option 1: They were air sacs to extend lung function. It's possible the spines supported a large air-filled structure ("supravertebral diverticulum") that extended to the lungs, allowing better oxygen utilization, inflating for mating or challenge or communication. (🧑🎨: Fred Wierum)
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