Crustaceans contain a great variety of sensilla along their antennules that enable them to sense both hydrodynamic and chemical stimuli in aquatic environments, and can be used to inspire the design of engineered sensing systems. For example, along the antennule of the freshwater crayfish, Procambarus clarkii, four predominant mechanosensory sensilla morphologies are found. To study their respo...

Trichogramma spp. (Hymenoptera Trichogrammatidae) are endoparasitic wasps that attack the eggs of mainly Lepidoptera species. The morphology of the antennal multiporous gustatory sensilla of five Trichogramma species is studied and compared: Trichogramma cacoeciae Marchal, Trichogramma chilonis Ishii, Trichogramma dendrolimi Matsumura, Trichogramma turkestanica Meyer, and Trichogramma sibericum...

Paysandisia archon (Lepidoptera: Castniidae) is a serious pest of palm trees. A comprehensive knowledge of the insect olfactory system is essential for the development of efficient semiochemical-based control methods. The olfactory sensilla are located particularly on the antennae, and these can detect plant volatiles that provide important cues for the insects in the search for their host plan...

Hydrotaea chalcogaster is a fly species of medical and forensic importance in many parts of the world. In this study, we investigated the sensilla of the antenna and palp of the adult female fly using scanning electron microscopy. The antennal scape has one type of sensillum, the sharp-tipped sensillum trichodeum; whereas, the antennal pedicel also possessed this type of sensillum in addition t...

ABSTRACT Species of the scarab beetle genus Liogenys are potential pests to several crops in Brazil. This study aimed describe antennal sensilla suturalis (Blanchard, 1851). Adults were collected a pasture area Balsamo, Sao Paulo state, Brazil, using light trap. The antennae dissected and images obtained scanning electron microscope. Sensilla ampulacea (pores), s. auricilica, basiconica, placod...

A comparative SEM study of palp sensory surfaces in 25 caddisfly species representing seven families reveals types sensilla: long trichoid, blunt chaetoid, campaniform, mushroom-like pseudoplacoid, petaloid, thick basiconic and thin sensilla. Long trichoid chaetoid sensilla are present on all segments both pairs palps. First second maxillary palps bear groups sclerotised their medial surface. O...

The three-dimensional structures of two odorant binding proteins (OBPs) and one chemosensory protein (CSP) from a polyphagous ectoparasitoid Scleroderma guani (Hymenoptera: Bethylidae) were resolved bioinformatically. The results show that both SguaOBP1 and OBP2 are classic OBPs, whereas SguaCSP1 belongs to non-classic CSPs which are considered as the "Plus-C" CSP in this report. The structural...

Ultrastructural examination of grooved-peg (GP) sensilla on the antenna of fifth instar Triatoma infestans nymphs by scanning electron microscopy and transmission electron microscopy reveal that they are 8-18 microm long with a diameter of about 2-2.8 microm at the non-articulated base. Some pegs have a terminal pore. These double-walled wall-pore (dw-wp) sensilla have an outer cuticular wall w...

Antennae of five male butterflies namely Danaus chrysippus (Linnaeus) (Danaidae), Pontia daplidice moorie (Rober) (Pieridae), Junonia lemonias (Nymphalidae), Chilades pandava Horsfield (Lycaenidae) and Papilio demoleus Linnaeus (Papilionidae) have been studied under scanning electron microscope for observing the type number sensilla dispersed on their component segments i.e. Scape, Pedicel Flag...

Stable flies, Stomoxys calcitrans L. (Diptera: Muscidae), are economically important biting flies that have caused billions of dollars in losses in the livestock industry. Field monitoring studies have indicated that olfaction plays an important role in host location. To further our understanding of stable fly olfaction, we examined the antennal morphology of adults using scanning electron micr...