Farke, A.A.; Maxwell, W.D.; Cifelli, R.L.; Wedel, M.J.
taxonomy · topology · range · morphology · biogeography · methods
Primary specimen description and sampled neoceratopsian phylogeny/biogeography; a single fossil does not define the full Ceratopsia range.
Ceratopsia is represented by a sampled morphology matrix in which the Aquilops holotype is placed among early neoceratopsians; that placement and its biogeographic implications do not identify a direct ancestor or a clade-wide first appearance.
claim:taxon:ceratopsiaCeratopsia is displayed at 113–100.5 Ma only as the Early Cretaceous Aquilops sample interval, not the origin or total duration of Ceratopsia. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:ceratopsia:source-bounded-range-rc49