Table 3.

Net diversification rate for two solariellid clades based on equations in Magallon and Sanderson (2000), with no extinction (ε = 0) or high extinction (ε = 0.9). N = estimated total number of species in clade, missing = number and percentage not included in this study

	Age (Myr)	ε = 0	ε = 0.9	N (missing)
Bathymophila	20.46	0.121	0.056	24 (7, 29%)
		0.138	0.069	34 (17, 50%)
		0.158	0.085	51 (34, 67%)
Ilanga	40.14	0.076	0.039	42 (12, 30%)
		0.075	0.038	50 (20, 50%)
		0.085	0.047	60 (40, 67%)