Titanosauria is represented by the Patagotitan specimen set and its sampled sauropod matrix placement; the result constrains that taxon and a body-mass analysis, not the complete clade range, origin or ancestor chain.
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References / paperA new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs
Carballido, J.L.; Pol, D.; Otero, A.; Cerda, I.A.; Salgado, L.; Garrido, A.C.; Ramezani, J.; Cúneo, N.R.; Krause, J.M.
Year2017
Source roleprimary-study
DOI / ID10.1098/rspb.2017.1219
Fitness and scope
taxonomy · topology · range · morphology · ecology · geochronology · methods
Primary description, radiometric context and sampled phylogenetic/body-mass analysis of Patagotitan within Titanosauria.
Claim ledger
Titanosauria is displayed at 101.8–101.4 Ma only as the directly dated Patagotitan quarry window, not the first or last appearance of Titanosauria. The interval is a source-bounded sample window, not a global FAD, LAD, divergence date, continuous occupancy claim or direct-ancestor assertion.
claim:taxon:titanosauria:source-bounded-range-rc49