Table 2.
Fossils used for calibrations in this study, selected from Yu et al. (2017)
| Calibration nodes | Fossils | Calibration types | Ages (epoch) | Fossil assignment | Constrained age | References |
|---|---|---|---|---|---|---|
| C1 | NA | Secondary calibration | 79.8–102.5 | Root of the tree (stem of Theaceae) | 79.8–102.5 | (Foster et al., 2017; Yu et al., 2017b) |
| C2 | NA | Secondary calibration | 39.6–74.7 | Crown of Theaceae | 39.6–74.7 | (Yu et al., 2017b) |
| C3 | NA | Secondary calibration | 33.8–66.9 | Crown of Gordonieae and Theeae | 33.8–66.9 | (Yu et al., 2017b) |
| C4 | Schima kwangsiensis X. G. Shi, C. Quan et J. H. Jin | Fruits, seeds fossil | Late Oligocene | Stem of Schima | 23.0 | (M. M. Li et al., 2013; Quan et al., 2016; X. G. Shi et al., 2017) |
| C5 | Hartia quinqueangularis(Menzel) | Fruits, seeds fossil | Late Miocene | Stem of Hartia (now a clade within Stewartia) | 5.3 | (Mai, 1975) |