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-rangeResolution of the early placental mammal radiation using Bayesian phylogenetics
Murphy, W.J. et al.
年份2001
来源角色primary-study
DOI / ID10.1126/science.1067179
适用范围
拓扑 · range · 生物地理
Primary 16,397-base-pair Bayesian and maximum-likelihood analysis; topology, dating and biogeographic explanation are model-conditioned.