Difference in ventral channel measured in Euclidean distances for pairs of co-occurring Niphargus species and their inferred ancestors.

Species pair: upper, mean, lower—COMPARE provides estimates of ancestral states with standard errors. We calculated three estimates of ancestral states, as mean, lower (reconstructed value—standard error) and upper (mean + standard error) and repeated the analyses for all three values.Ecological process: the putative process leading to either significant similarity or significant difference of coexisting species. The p value indicates the probability that species pair is more similar or different than expected when compared to pairs of species randomly drawn from the corresponding regional species pool.Difference in ventral channel measured in Euclidean distances for pairs of co-occurring Niphargus species and their inferred ancestors.