Antennal area and sensilla abundance by sex and activity.

(A) Positive correlation between antennal area and total sensilla number (N = 42, R 2 = 0.389, Spearman’s rho = 0.6677, p < 0.0001): larger antennae tend to have more sensilla; (B) Negative correlation between antennal area and total sensilla density (N-42, R 2 = 0.542, Spearman’s rho = -0.7094, df = 1, p < 0.0001): larger antennae tend to have a lower sensilla density; (C) Comparison of mean sensilla number between diurnal and nocturnal species: diurnal species have significantly more sensilla than nocturnal species (x̄ Diurnal = 4768 ± 1495, x̄ Nocturnal = 2349 ± 1242; DFDen = 5, F = 8.33, p = 0.0343); (D) Comparison of mean sensilla number between females and males: males have significantly more sensilla than females (x̄ Male = 3776 ± 1919, x̄ Female = 2995 ± 1638; DFDen = 38, F = 8.7, p = 0.0054).