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Last Non-Mammaliaform Cynodonts

By Michael Alan Prestwood

Thu 21 May 2026
Published 14 hours ago.
Updated 14 hours ago.
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Last Non-Mammaliaform Cynodonts

~125 Million years ago

Using Tritylodontidae again, same as last n0n-mammaliaform therapsid. They are the best public-facing “last non-mammal cynodont” marker: advanced, rodent-like, herbivorous cynodonts that persisted into the Early Cretaceous. Nature describes tritylodontids as nonmammaliaform herbivorous cynodonts that originated in the Late Triassic, diversified in the Jurassic, and survived into the Early Cretaceous.

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Michael Alan Prestwood
Author & Natural Philosopher
Prestwood writes on science-first philosophy, with particular attention to the convergence of disciplines. Drawing on his TST Framework, his work emphasizes rational inquiry grounded in empirical observation while engaging questions at the edges of established knowledge. With TouchstoneTruth positioned as a living touchstone, this work aims to contribute reliable, evolving analysis in an emerging AI era where the credibility of information is increasingly contested.
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