References / paperThe placental mammal ancestor and the post–K–Pg radiation of placentals
O'Leary, M.A. et al.
Year2013
Source roleprimary-study
DOI / ID10.1126/science.1229237
Fitness and scope
topology · range · morphology · geochronology
Primary combined-data analysis using MorphoBank phenomic characters and GenBank sequences; reconstructed anatomy and node ages are model outputs.
Claim ledger
fossil-range · contestedThe 100–0 Ma Placentalia route is a model envelope: a molecular analysis estimated a roughly 103 Ma deep placental split, whereas the phenomic combined analysis placed sampled crown diversification after K–Pg; neither model is a fossil FAD or ancestor observation.
claim:taxon:placentalia:root-range