Table 4.

Results of COEVOL correlation analysis

	Clade	Variable 1	Variable 2	n	Covariances	Correlation coefficient	Posterior probability
EVAC1	Mammalia	ω	relative testes mass	39	2.06	0.416	0.07
	Carnivora	ω	relative testes mass	8	−1.29	−0.24	0.35
	Cetartiodactyla	ω	relative testes mass	9	2.29	0.45	0.17
	Rodentia	ω	relative testes mass	6	3.53	0.65	0.09
	Primates	ω	relative testes mass	11	2.40	0.41	0.19
EVAC2	Mammalia	ω	relative testes mass	39	1.21	0.35	0.14
	Cetartiodactyla	ω	relative testes mass	10	0.72	0.67	0.06
	Rodentia	ω	relative testes mass	7	−1.55	−0.51	0.17
	Primates	ω	relative testes mass	10	−0.16	− 0.11	0.40
Evac3a	Rodentia	ω	relative testes mass	6	0.06	0.09	0.58

Correlations with relative testes mass are corrected for body mass (see material and methods section), ω = evolutionary rate computed by COEVOL, n = number of species in analysis, trends are shown in boldface