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:ornithischiaThe phylogeny of the ornithischian dinosaurs
Butler, R.J.; Upchurch, P.; Norman, D.B.
Year2008
Source roleprimary-study
DOI / ID10.1017/S1477201907002271
Fitness and scope
taxonomy · topology · methods · range
Broad morphology-based cladistic analysis of Ornithischia; recovered relationships remain matrix- and sampling-dependent.
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-rc49