Pairwise comparisons computed on mean Euclidean distances of sounds emitted by ants and parasite.

Differences computed by two-sample t-tests in the average pairwise Euclidean distances, reported in Table 1, between groups of sounds produced by P. favieri, its host ant Pheidole pallidula and Myrmica scabrinodis. T-test values are differently ordered in each table to show in the diagonals series of increasing distances between a type of sound (e.g. Pa) and all the other sound stimuli (Pb, Pc, Q, S, W, Qm, Wm): Pa-S = Pa-W < Pa-Pc = Pa-Pb < Pa-Q < Pa-Wm < Pa-Qm; Pb-W < Pb-S = Pb-Pa < Pb-Q = Pb-Pc < Pb-Wm < Pb-Qm; Pc-Q < Pc-S < Pc-Pa = Pc-W < Pc-Pb < Pc-Wm < Pc-Qm; Q-S = Q-Pc < Q-W< Q-Pb = Q-Pa < Q-Qm = Q-Wm; S-Q < S-Pc < S-W < S-Pa< S-Pb < S-Wm = S-Qm; W-Pb < W-S < W-Pa < W-Pc < W-Q < W-Wm < W-Qm (< stands for statistical differences in the mean distances between the groups, while = means no differences). *P<0.05 **P<0.01 Pairwise comparisons computed on mean Euclidean distances of sounds emitted by ants and parasite.