Changes related to gender, geographic population and habitat in the antennal phenotype of Triatoma patagonica Del Ponte, 1929 (Hemiptera: Reduviidae)

► We provide first complete description of the antennal phenotype of Triatoma patagonica. ► Four types of sensilla were observed in three antennal segments. ► The univariate analysis showed significant differences between sexes. ► Multivariate analysis separated the populations of different geographical origin. ► These results suggest phenotypic plasticity in T. patagonica.