100–0 Ma 的胎盘类路线是模型包络：分子分析估计了约 103 Ma 的深层胎盘类分裂，而表型—分子联合分析把所取样冠群辐射置于 K–Pg 之后；两种模型都不是化石首现或祖先观察。
claim:taxon:placentalia:root-rangeThe placental mammal ancestor and the post–K–Pg radiation of placentals
O'Leary, M.A. et al.
年份2013
来源角色primary-study
DOI / ID10.1126/science.1229237
适用范围
拓扑 · range · 形态 · geochronology
Primary combined-data analysis using MorphoBank phenomic characters and GenBank sequences; reconstructed anatomy and node ages are model outputs.