Table 2.

Phylogenetic signal estimates (Blomberg’s κ and Pagel’s λ) for brain mass, olfactory bulb mass (OB), vLGN/dLGN ratio, and volumes of lateral geniculate nucleus (LGN), dorsal lateral geniculate nucleus (dLGN), ventral lateral geniculate nucleus (vLGN), superior colliculus (SC), medial geniculate nucleus (MGN), and inferior colliculus (IC)

Measure	κ	p value	λ	p value
Brain	0.603	0.065	0.594	0.031
OB	0.850	0.009	1	0.110
LGN	0.534	0.175	<0.001	1
dLGN	0.556	0.134	<0.001	1
vLGN	0.415	0.438	<0.001	1
vLGN/dLGN	0.739	0.019	0.596	0.190
SC	0.861	0.011	1	0.118
MGN	0.489	0.235	<0.001	1
IC	0.448	0.339	<0.001	1

Each measure, except vLGN/dLGN ratio, is size-independent, i.e., based on the residuals from a linear regression.