Table 4. Partial regression coefficients (b_i) of non-phylogenetic (OLS) and phylogenetic (PGLSλ) multiple regressions of geographic range size as a function of MIBMR, mass and the range latitudinal midpoint in the North (> 23.7° lat), Tropics (23.7° to -23.7° lat), and South (< -23.7° lat).

Regression model:			OLS					PGLSλ
Group	Region	Variable	bi	SE	p-value	Model R2	Model AICc	bi	SE	p-value	λ	Model AICc
Mammals	North	MIBMR	0.791	0.244	0.02	0.16	475.37	0.557	0.326	0.09	0.36	449.18
		mass	0.181	0.051	0.001			0.130	0.070	0.06
		latitude	0.016	0.006	0.01			0.022	0.005	<0.001
	Tropics	MIBMR	-0.01	0.311	0.97	0.02	636.33	0.032	0.303	0.91	0.72	562.46
		mass	0.094	0.046	0.04			0.068	0.066	0.30
		latitude	0.003	0.004	0.47			-0.005	0.004	0.20
	South	MIBMR	0.078	0.472	0.87	0.28	188.05	0.416	0.443	0.35	0.61	182.64
		mass	-0.022	0.071	0.75			0.085	0.084	0.31
		latitude	-0.069	0.012	<0.001			-0.076	0.011	<0.001
Rodents	North	MIBMR	1.051	0.443	0.02	0.13	332.26	0.894	0.448	0.05	0.28	323.24
		mass	0.023	0.107	0.83			0.153	0.128	0.23
		latitude	0.018	0.008	0.02			0.024	0.008	0.002
	Tropics	MIBMR	-0.521	0.589	0.38	0.08	172.68	-0.263	0.309	0.40	1.29	95.45
		mass	0.146	0.137	0.29			0.114	0.073	0.13
		latitude	-0.008	0.006	0.12			-0.001	0.003	0.68
	South	MIBMR	1.420	0.807	0.09	0.20	102.77	1.370	0.699	0.06	0.50	93.31
		mass	-0.133	0.153	0.39			0.312	0.188	0.11
		latitude	-0.048	0.017	0.01			-0.052	0.016	0.003

All variables were log₁₀ transformed. Statistically significant (p < 0.05) and “marginally significant” (0.10 < p > 0.05) coefficients are indicated by p-values in bold.