Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 21adductor n. [L. ad, near; ducere, to lead] A muscle that drawsparts together or toward the median axis. see adductormuscles.adductor coxae (ARTHRO: Insecta) The second muscle of thecoxa.adductor mandibulae (ARTHRO) The muscle that retracts orcloses the mandible.adductor muscles 1. Any muscle that adducts or bring partsinto apposition. 2. (ARTHRO: Crustacea) In bivalves, musclesattached to the carapace that pull it to the body, orconnect the carapace. a. In Barnacles, any transverse muscle,especially those attached to the scutum for closing theaperture. 3. (MOLL: Bivalvia) A single posterior or an anteriorand posterior muscle connecting the two valves. a. Inoysters, the crescent shaped "catch" muscle that holds thevalves in a set position, or the "quick" muscle, the mainopening and closure muscle.adductor muscle scar (ARTHRO: Crustacea) In Ostracoda, animpression of the adductor muscles on the valve interior,serving for closure of valves.adductor pit (ARTHRO: Crustacea) Depression on the innersurface of the scutum between the adductor ridge and theoccludent margin for the attachment of the adductor muscleof certain barnacles.adductor ridge (ARTHRO: Crustacea) In sessile barnacles, thelinear elevation on the inner surface bounding the adductorpit on the tergal side.adecticous a. [Gr. a, without; dektikos, able to bite] (ARTHRO:Insecta) Pertaining to pupae without articulated mandibles.see decticous.adelocerous, adelaceratous a. [Gr. adelos, concealed; keras,horn] (ARTHRO: Insecta) Having antennae concealed in acavity or groove.adelocodonic a. [Gr. adelos, concealed; kodon, a bell] (CNID:Scyphozoa) Refers to degenerate attached medusae lackingan umbrella (bell).