Closer view of antennal sensory organs of two Leptoglossus species (Insecta, Hemiptera, Coreidae)

Abstract

Detailed description of antennal sensory organs of Leptoglossus occidentalis Heidemann, 1910 (Insecta: Hemiptera: Heteroptera: Coreidae) and a comparison with L. zonatus (Dallas, 1852) are presented. A novel approach that combines the advantages of field emission scanning electron microscopy (FE-SEM) and atomic force microscope (AFM) was used to detail micromorphological structures. A simplified classification system for sensilla that eliminates the subjective aspects of morphology, such as their shape, is proposed. Fourteen sensory organs have been classified into three main groups: (a) aporous sensilla with a flexible socket, (b) porous sensilla with a flexible socket and (c) porous sensilla with an inflexible socket. A large variety of sensory organs (nine types) with olfactory functions are described. The antennal sensory organs have been recognized as one of the factors responsible for the evolutionary success of Leptoglossus spp. and their status as important pests and invasive species.

Microstructural Adaptation for Prey Manipulation in the Millipede Assassin Bugs (Hemiptera: Reduviidae: Ectrichodiinae)

“…Antennal sensilla chaetica have grooves and flexible sockets, and this type was categorized as typical mechanosensilla, which have functions of detection and transmission of various mechanical stimuli [46]. Sensilla basiconica, with deep longitudinal grooves and an inflexible socket, probably perceive chemical stimuli regarding the host location and sexual recognition [24,25,46,53]. Millipede assassin bugs had been observed swaying antennae toward their prey during predation [6], which may represent a signal-receiving behavior.…”

Antennal Transcriptome Evaluation and Analysis for Odorant-Binding Proteins, Chemosensory Proteins, and Suitable Reference Genes in the Leaf Beetle Pest Diorhabda rybakowi Weise (Coleoptera: Chrysomelidae)

“…The chemical environment plays a critical role in the olfaction of insect communication, with host plants, food, habitat, and predators having their characteristic chemical signaling sources, thus creating a communication network (insect odorscapes) between insects and environments, e.g., volatile organic compounds (VOCs), volatile plant compounds (VPCs), and sex pheromones [5][6][7]. Various external chemicals can enter lymph through surface pores of hair-like or cone-like sensilla [8]. Soluble proteins, odorant-binding proteins (OBPs), and chemosensory proteins (CSPs) selectively bind and transport odorant molecules to the surface of olfactory neurons in the membrane, and odorant receptors convert captured chemicals into nerve impulses transmitted to the brain for regulation of various insect behavior [9,10].…”

Reproductive biology of overwintering leaffooted bug Leptoglossus zonatus (Hemiptera: Coreidae) in California

“…In California's nut producing areas in the San Joaquin Valley, L. zonatus has 3 to 4 overlapping generations (Daane et al 2019). Adults are known to move among host plants throughout the season, before migrating to their overwintering sites, such as palm trees, piles of debris around orchards, or citrus orchards (Daane et al 2016), often in large aggregates that are believed to form, in part, due to an aggregation pheromone (Franco-Archundia et al 2018, Taszakowski et al 2023). The similarly male-produced sex pheromone (Inoue et al 2019) seems to be utilized in spring, as the insects can regularly be seen in mating pairs during that time.…”