Rhynchocephalia is represented as a formerly diverse sampled radiation with Sphenodon as its sole living lineage; quantitative disparity results do not make the tuatara an unchanged ancestor or a proxy for every fossil member. This navigation entry is not a phylogeny or a complete taxon dossier.
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Rhynchocephalia is represented as a formerly diverse sampled radiation with Sphenodon as its sole living lineage; quantitative disparity results do not make the tuatara an unchanged ancestor or a proxy for every fossil member.
claim:taxon:rhynchocephaliaThe time-scaled Rhynchocephalia dataset spans Late Triassic fossils to living Sphenodon, supporting a rounded 238 Ma–present study-sample window rather than an exact global FAD or unchanged lineage claim.
claim:taxon:rhynchocephalia:range-boundary