Reproductive isolation see isolate

repugnatorial a. [L. repugnans, offensive] Repellent; offensive as to drive away.

repugnatorial glands 1. (ARTHRO: Diplopoda) Stink glands. 2. (ARTHRO: Insecta) Glands secreting noxious liquids or vapors to repel antagonists.

reservoir n. [L. re, back; servo, keep] A case or cavity for storage of certain fluids or secretions. see ampulla.

reservoir host A definitive host in which the infection usually resides in nature.

resilifer n. [L. resilire, to leap back; fero, bear] (MOLL: Bival-via) A Modification of a bivalve shell to which the resilium is attached.

resilin n. [L. resilire, to leap back] (ARTHRO: Insecta) A colorless, rubber-like protein found in elastic and extensible cuticle of insects that stores energy for tension release to restore original position.

resilium n. [L. resilire, to leap back] (MOLL: Bivalvia) The internal ligament, irrespective of composition; in oysters rests in a subtrigonal central socket or fossa.

resinous a. [Gr. resina, resin] Having the appearance of rosin; clear brownish yellow.

resonator n. [L. re, again; sonare, to sound] (ARTHRO: In-secta) A structure functioning to intensify or activate sound; a thin vibrating plate or lamella.

resonator ridge (ARTHRO: Insecta) In Diptera, a ridge on the hind femur that rubs against the stridulatory file to produce sounds.

resorption n. [L. re, again; sorbere, drink in] (MOLL: Gastropoda) The removal of a previously formed shell by action of the living gastropod.

respiration n. [L. re, back; spirare, to breathe] The intake of oxygen and giving off of carbon dioxide.

respiratory funnel (ARTHRO: Insecta) In Diptera, a distinctive chitinous funnel attached to the host tracheal system so that encapsulation does not impair the respiration in older tachinid larvae.

respiratory horn (ARTHRO: Insecta) 1. In Diptera, paired pro-thoracic protuberances on the aquatic pupae of most Culi-cidae and Ceratopogonidae; respiratory trumpet. 2. A sharply pointed post-abdominal siphon in some aquatic insect pupae that are thrust into the aerenchyma of aquatic plants.

respiratory movements Movements designed to increase the supply of oxygen or disperse carbon dioxide, such as abdominal movements in insects or undulations of aquatic oligochaetes.

respiratory siphon (ARTHRO: Insecta) In Diptera, the caudal breathing tube of culicid larvae.

respiratory tree (ECHINOD: Holothuroidea) Branched cloacal tubules thought to have a respriatory function.

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