Table 2. Statistical analysis of individual methylated loci for X. securis (above) and F. enigmaticus (below). ANOVA or Welch F test, and Kruskal-Wallis H analysis, for comparing means and medians respectively; Tukey’s and Mann-Whitney post-hoc tests for respective pairwise comparisons of means and medians (in italics, statistically significant p-values).

Xenostrobus securis
	Test for equal means: ANOVA				Test for equal medians
	Sum of squares	df	Mean square	F	p (same)	H (chi2):	28.71
Between groups	0.27815	2	0.1391	18.34	0.0000003	Hc (tie corrected):	28.72
Within groups	0.599038	79	0.0076			p (same):	0.0000006
Total:	0.877188	81
Tukey’s post-hoc					Mann-Whitney post-hoc (P-values)
	Atlantic	Bay of Biscay	Mediterranean
Atlantic		0.0001154	0.9968				Atlantic	Bay of Biscay
Bay of Biscay	7.126		0.0001135			Bay of Biscay	0.000003
Mediterranean	0.1094	7.235				Mediterranean	0.6993	0.000009
Ficopomatus enigmaticus
Test for equal means: Welch F						Test for equal medians
F	df	P-value				H (chi2):	5.41
4.969	6, 186	0.051				Hc (tie corrected):	5.41
						p (same):	0.066
Tukey’s post-hoc
	Bay of Biscay	Mediterranean	New Zealand			Mann-Whitney post-hoc (P-values)
Bay of Biscay		0.08647	0.1012				Bay of Biscay	Mediterranean
Mediterranean	3.4		0.9947			Mediterranean	0.06619
Nwe Zealand	3.26	0.1401				New Zealand	0.0606	0.9025