Edmontosaurus is bounded by Campione and Evans’s cranial growth and variation sample, which supports a reduced latest-Cretaceous North American species set; the morphometric result does not assign every hadrosaurid skull or define exact genus endpoints. This navigation entry is not a phylogeny or a complete taxon dossier.
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In Campione and Evans's skull sample, the long, low skulls historically assigned to Anatotitan copei fall within or close to Edmontosaurus annectens variation; the authors explain these proportions through size-related allometry and individual variation, with crushing potentially accentuating skull shape.
claim:taxon:edmontosaurus:morphologyEdmontosaurus is bounded by Campione and Evans’s cranial growth and variation sample, which supports a reduced latest-Cretaceous North American species set; the morphometric result does not assign every hadrosaurid skull or define exact genus endpoints.
claim:taxon:edmontosaurusEdmontosaurus is displayed at 73–66 Ma only as the stratigraphic envelope of the sampled skulls, not an independently established global genus duration. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:edmontosaurus:source-bounded-range-rc49