Schematic illustration of the waiting   times in a calibrated tree and the numbers of lineages present for each type   of diversification process (interspecies diversification and within-species   coalescence) during each waiting interval. Branches are categorized as either   between species (thin lines) or within species branching (bold lines)   according to the procedures described in Material and Methods.

校准树中种间、种内分化持续时间的示意图，以及在每个分化等待间隔期间，不同分化过程中出现的谱系数量。根据材料与方法中描述的程序，分支可分为种间（细线）或种内分支（粗线）。

Pons J, Barraclough T G, Gomez-Zurita J, et   al. Sequence-based species delimitation for the DNA taxonomy of undescribed   insects[J]. Systematic biology, 2006, 55(4): 595-609.