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(a) Cicurina, (b) Habronattus and (c) Nesticus. The main plot shows estimates of ω, while the inset shows Ka (top) and Ks (bottom). Outliers have been removed to better visualize the inter-quartile ranges. Mann-Whitney U tests indicate that all parameter estimates are significantly greater in orphan genes, with the exception of the Nesticus Ks comparison which shows no significant difference.
