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Table 2 Springer et al.’s [10] placental calibration minima that are older than our 95% CIs for both the independent and autocorrelated rates models, using our dR40 calibration set

From: The soft explosive model of placental mammal evolution

  1. The minimum difference in age is between the fossil minimum and the oldest of the two 95% CIs. Differences ≥4.0 are shaded grey. Each calibration minimum bound is poorly supported, as discussed in Additional file 1: “Incorrect or poorly supported fossil placements”