An enlarged skeletal-character analysis samples all main Late Permian–Early Jurassic cynodont clades and recovers basal cynodonts and epicynodonts as successive grades relative to Eucynodontia; the topology is a matrix hypothesis, not observed ancestry. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range259.5–174.7 Ma
Content packagemammal-origins
PBDBNot linked
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
topology · medium
An enlarged skeletal-character analysis samples all main Late Permian–Early Jurassic cynodont clades and recovers basal cynodonts and epicynodonts as successive grades relative to Eucynodontia; the topology is a matrix hypothesis, not observed ancestry.
claim:taxon:cynodontia:topologyfossil-range · medium
Cynodontia is displayed at 259.5–174.7 Ma only as the temporal coverage of the matrix sample, not an uninterrupted global range or direct ancestor chain. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:cynodontia:source-bounded-range-rc49
Known limits
A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.