Ornithischia is represented by the taxa and characters sampled in Butler and colleagues’ morphology analysis; internal relationships are a matrix hypothesis and do not encode direct ancestors or exact clade duration.
claim:taxon:ornithischiaOrnithischia
Ornithischia is represented by the taxa and characters sampled in Butler and colleagues’ morphology analysis; internal relationships are a matrix hypothesis and do not encode direct ancestors or exact clade duration. This navigation entry is not a phylogeny or a complete taxon dossier.
Represented range216.5–201.4 Ma
Content packagedinosauria
PBDBNot linked
Evidence boundary
Automated checks cover structure, identifiers, translations and links only; maintainer and external expert review are not complete.
Claim ledger
Ornithischia is displayed at 216.5–201.4 Ma only as the source-bounded uppermost-Triassic Eocursor sample and its ICS stage conversion, not an Ornithischia FAD or LAD. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:ornithischia:source-bounded-range-rc49Known limits
- A missing branch or fossil occurrence does not imply biological absence. Internal nodes are not calibrated divergence estimates.
- PBDB external identifier withheld: accepted-rank-mismatch.
References
- The phylogeny of the ornithischian dinosaursButler, R.J.; Upchurch, P.; Norman, D.B. · 2008 · DOI 10.1017/S1477201907002271
- International Chronostratigraphic Chart v2026/06Cohen, K.M.; Harper, D.A.T.; Gibbard, P.L.; Car, N. · 2026 · DOI 10.18814/epiiugs/2025/025001
- Open Tree of Life web servicesOpenTreeOfLife Project
- The Paleobiology Database application programming interfacePeters, S.E.; McClennen, M. · 2016 · DOI 10.1017/pab.2015.39