Table 4.

Results from Kruskal–Wallis ${\chi }^{\text{2}}$ tests of median congruence across higher taxa

Parameter	${\chi }^{\text{2}}$	$P$-value	Parameter	${\chi }^{\text{2}}$	$P$-value
GER	94.3	<2.2e–16	GER residuals	34.7	1.8e–06
GERt	91.7	<2.2e–16	GERt residuals	25.2	1.3e–04
GER*	59.5	1.5e–11	GER* residuals	17.8	3.3e–03
SCI	43.7	2.6e–08	SCI residuals	6.9	2.3e–01
MSM*	119.2	<2.2e–16	MSM* residuals	39.7	1.7e–07

Notes: There are significant differences in all indices of stratigraphic congruence partitioned across higher taxonomic groups. These differences are retained (but are less significant or non-significant) when the effects of the 10 independent variables are modeled out using a minimum adequate GLM (residuals in each case). Kruskal–Wallis ${\chi }^{\text{2}}$ values and associated values of $P$, with d.f. $=$ 5 in all cases (null states that all median values are equal in each case). For Nemenyi–Damico–Wolfe–Dunn post-hoc test results, see Supplementary Table S7, available on Dryad.