主流分子钟定年方法的原理、误差来源和使用建议

陈旸康, 王益, 李家亮, 王文韬, 冯端宇, 毛康珊

Principles, error sources and application suggestions of prevailing molecular dating methods

Yangkang Chen, Yi Wang, Jialiang Li, Wentao Wang, Duanyu Feng, Kangshan Mao

图4 化石年龄不确定性的3种情形。(a)“年轻但可靠”和“古老但有风险”的两种化石在化石年龄和可靠性两个维度上的分布, 其他大多数化石分布于两虚线围成的区域中。(b)某个类群已知最古老化石的年龄随着古生物学发掘过程不断扩展补充、逐步接近类群真实分化时间的趋势。(c)随着化石定年技术的发展, 化石年龄的精确度不断提升。

Fig. 4 Three cases of fossil age uncertainty. (a) The present of “young but safe” and “old but risky” fossils in two dimensions: age of fossils and reliability. Most of the other fossils are distributed in the area surrounded by the two dotted lines. (b) The age of the oldest known fossil of a certain group tends to be close to the real divergence time of the group as the paleobiological excavation continues to expand. (c) With the development of fossil dating technology, the accuracy of fossil age has been improved.