For the beginning of Cynodonts, use the Late Permian, around 260 MYA, with early forms such as Procynosuchus. This is the branch where the mammal-like jaw, teeth, palate, and breathing package really starts tightening toward mammals.
First Cynodonts
~260 Million years ago
That Science Story,
was first published on TST 18 hours ago.
All story is part of the broader TST project.
Good thinking needs anchors. Tidbits provide them: concise, sourced, reusable pieces of evidence that help the larger TouchstoneTruth project stay grounded.
The end!