Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 819sory pit. 2. A small epithelial sense organ or nerve ending;a simple receptor complex.sensillum ampullaceum A sense organ in which the sensecone is a flask- or pouch-shaped cavity with no externalstructure evident; ampullaceous sensillum; sensory flasks.sensillum auriforme (ARTHRO: Chelicerata) In Acari, a senseorgan with flattened disks, similar to sensillum campaniformium.sensillum basiconicum A sense organ with an external processin the form of a minute cone or peg; basiconic sensillum.sensillum campaniformium A thin, flexible, dome-shapedsense organ that has no pore or opening, sometimes occurringin groups, that respond to strains on the cuticle, asopposed to individual muscle movement; sensory cupolum.sensillum chaeticum A sense organ with an external processin the form of a spine- or bristle-like seta, tactile in function.sensillum coeloconicum A sense organ with an externalprocess in the form of a thin-walled conical or peg-likeprojection in a shallow pit below the surface of the bodywall; coeloconic sensillum; sensory pit-peg.sensillum coelosphaericum (ARTHRO: Insecta) Olfactory receptor,lacking pore tubules, found on the last antennalsegment of Nicrophorus, composed of a complicated networkof filaments.sensillum coleum A sense organ that is completely coveredwith a sheath except for the internal canal.sensillum insiticum A sense organ that shows no evidence ofan external structure or pore, but the ciliary process ormodified cilia are embedded in the cuticle.sensillum opticum A light perceiving sense organ; an ommatidiumof a compound eye.sensillum placodeum A sense organ in the form of a flat,plate-like external membranous cover over an enlargedpore tubule, with the outer surface continuous with thegeneral surface; maybe olfactory in function; sensory