Antennal Sensilla in Longhorn Beetles (Coleoptera: Cerambycidae).

This article focuses on the morphology, classification, and diversity of antennal sensilla—microscopic sensory organs—in longhorn beetles (family Cerambycidae), emphasizing the need for standardized terminology to facilitate comparative studies. Longhorn beetles possess prominent antennae critical for chemosensation, which mediates host plant and mate recognition through various sensilla types, including Böhm bristles, sensilla chaetica, chemosensory hairs, sensilla basiconica, dome-shaped organs, sensilla coeloconica, and sensilla auricillica. The review synthesizes data from 30 publications covering 29 species across five cerambycid subfamilies, highlighting inconsistencies and gaps in sensilla identification and function, particularly due to limited transmission electron microscopy (TEM) and electrophysiological studies. The authors provide scanning electron microscopy (SEM) images of ten additional species to exemplify sensilla types and propose a preliminary standardized classification framework to support future research on the sensory biology, chemical ecology, and phylogenetics of longhorn beetles.