Sensillium see sensillum

sensillum n.; pl. -la [L. sensus, sense] 1. A receptor complex composed of a sense cell or units of sense cells plus associated structures: innervated hair, flat sensory plate, or sen sory pit. 2. A small epithelial sense organ or nerve ending; a simple receptor complex.

sensillum ampullaceum A sense organ in which the sense cone is a flask- or pouch-shaped cavity with no external structure evident; ampullaceous sensillum; sensory flasks.

sensillum auriforme (ARTHRO: Chelicerata) In Acari, a sense organ with flattened disks, similar to sensillum campani-formium.

sensillum basiconicum A sense organ with an external process in the form of a minute cone or peg; basiconic sensil-lum.

sensillum campaniformium A thin, flexible, dome-shaped sense organ that has no pore or opening, sometimes occurring in groups, that respond to strains on the cuticle, as opposed to individual muscle movement; sensory cupolum.

sensillum chaeticum A sense organ with an external process in the form of a spine- or bristle-like seta, tactile in function.

sensillum coeloconicum A sense organ with an external process in the form of a thin-walled conical or peg-like projection in a shallow pit below the surface of the body wall; coeloconic sensillum; sensory pit-peg.

sensillum coelosphaericum (ARTHRO: Insecta) Olfactory receptor, lacking pore tubules, found on the last antennal segment of Nicrophorus, composed of a complicated network of filaments.

sensillum coleum A sense organ that is completely covered with a sheath except for the internal canal.

sensillum insiticum A sense organ that shows no evidence of an external structure or pore, but the ciliary process or modified cilia are embedded in the cuticle.

sensillum opticum A light perceiving sense organ; an om-matidium of a compound eye.

sensillum placodeum A sense organ in the form of a flat, plate-like external membranous cover over an enlarged pore tubule, with the outer surface continuous with the general surface; maybe olfactory in function; sensory plates.

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