Multiple Eunotosaurus specimens and rib sections document broadened ribs and distinctive bone growth, while turtle-stem placement and shell homology remain analytical interpretations.
Represented range265.1–259.5 Ma
RegionsBeaufort Group, Karoo Basin, South Africa
CladesPan-Testudines · Eunotosaurus africanus
Claim ledger
morphology · medium
Eunotosaurus specimens including sectioned rib NHM PV R 4949 document broadened ribs formed by successive bone deposition, but turtle-stem placement, shell homology and functional consequences are analytical rather than direct ancestral observations.