TABLE 2.

The results of tests of phylogenetic signal, slope, intercept, adjusted R‐squared, and p‐values for all PGLS regressions run with the Prum + Jetz phylogeny

Regression	Pagel's λ	p‐value	Slope	Intercept	Adj. R 2	p‐value
OT Vol. vs. BR Vol.	6.61e−5	1.00	0.72	−0.80	0.64	9.65e−9
OL SA vs. ER SA	1.00	0.096	0.69	0.049	0.71	3.27e−10
% OT Vol. vs. % OL SA	6.61e−05	1.00	1.35	−1.65	0.79	1.24e−12
OT Vol. vs. OL SA	7.03e−05	1.00	1.44	−2.19	0.88	<2.20e−16
H Vol. vs BR Vol.	0.75	0.46	1.24	−4.23	0.87	2.93e−12
W SA vs. ER SA	1.00	2.54e−3	1.17	−3.40	0.86	7.00e−12
% H Vol. vs. % W SA	6.61e−5	1.00	0.91	−0.016	0.61	1.58e−6
H Vol. vs. W SA	0.48	0.68	1.31	−0.85	0.91	1.50e−14
OT Vol. vs. BR Vol.	6.61e−5	1.00	0.72	−0.80	0.64	9.65e−9
OL SA vs. ER SA	1.00	0.096	0.69	0.049	0.71	3.27e−10
% OT Vol. vs. % OL SA	6.61e−05	1.00	1.35	−1.65	0.79	1.24e−12
OT Vol. vs. OL SA	7.03e−05	1.00	1.44	−2.19	0.88	<2.20e−16
H Vol. vs BR Vol.	0.75	0.46	1.24	−4.23	0.87	2.93e−12
W SA vs. ER SA	1.00	2.54e−3	1.17	−3.40	0.86	7.00e−12
% H Vol. vs. % W SA	6.61e−5	1.00	0.91	−0.016	0.61	1.58e−6
H Vol. vs. W SA	0.48	0.68	1.31	−0.85	0.91	1.50e−14

Phylogenetic signal is low and insignificant in most regressions. All of the relationships represented by these regressions are significant (p = 0.05). Abbreviations: BR, brain remainder; ER, endocast remainder; H, hyperpallium; OL, optic lobe; OT, optic tectum; SA, surface area; Vol., volume; W, Wulst.