Table 3. Sensitivity analysis devised to explore the robustness of divergence-time estimates to changes in prior hyperparameters and analysis settings.

Analysis	MRCA Citharinoidea Prior	MRCA Distichodus Prior	Secondary Calibrations	UCLN, Yule, and Substitution Model Priors
1	Intermediate	Intermediate	Yes	Default
2	Intermediate	Young	Yes	Default
3	Intermediate	Old	Yes	Default
4	Young	Intermediate	Yes	Default
5	Old	Intermediate	Yes	Default
6	Intermediate	Intermediate1	Yes	Default
7	Intermediate	Intermediate	No2	Default
8	No	No	Yes	Default
9	Intermediate	Intermediate	Yes	Uniform
10	Intermediate	Young	Yes	Uniform
11	Intermediate	Old	Yes	Uniform
12	Young	Intermediate	Yes	Uniform
13	Old	Intermediate	Yes	Uniform
14	Intermediate	Intermediate1	Yes	Uniform
15	Intermediate	Intermediate	No2	Uniform
16	No	No	Yes	Uniform

¹ Calibrated as stem lineage

² Calibrated using implied tree prior