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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 921taxis in which an animal directs itself in relation to a source<strong>of</strong> stimulation by comparing the amount <strong>of</strong> stimulation oneither side <strong>of</strong> it, i.e., spiders in their web retrieving theirprey. see klinotaxis, telotaxis.trumpet n. [OF. trompe, trumpet] (ARTHRO: Insecta) In Diptera,paired, usually movable respiratory structures, locatedon the dorsal portion <strong>of</strong> the cephalothorax <strong>of</strong> culicidpupae. see laticorn trumpet, angusticorn trumpet.truncate a. [L. truncus, cut <strong>of</strong>f] Terminating abruptly; endingsquarely with a cut-<strong>of</strong>f edge. truncation n.trunk n. [L. truncus, cut <strong>of</strong>f] 1. (ANN) a. In Polychaeta, thebody between the peristomium and the pygidium. b. In Oligochaeta,the body between the peristomium and periproct.2. (ARTHRO: Crustacea) The postcephalic portion <strong>of</strong>the body. 3. (ARTHRO: Insecta) The thorax.trypsin n. [Gr. tryein, to rub down; pepsis, digestion] An enzymethat catalyzes the hydrolysis <strong>of</strong> proteins. tryptic a.tryptophan, tryptophane n. [Gr. tryein, to rub down; phanein,to appear] An amino acid existing in proteins, fromwhich it is set free by tryptic digestion, that gives a red orviolet color on oxidation; it is essential to animal life.T-tubule Invaginations <strong>of</strong> the plasma membrane into the musclefiber between the Z- and H-bands.tube n. [L. tubus, tube] Any hollow, cylindrical structure.tube-feet (ECHINOD) Small, fluid-filled tubes <strong>of</strong> the water vascularsystem functioning in locomotion, adhesion, foodcapture and transport to the mouth; some are sensory andmay assist in respiration.tubercle n. [L. dim. tuber, hump] 1. A small knoblike orrounded protuberance. see torus. 2. (ARTHRO: Insecta) InDiptera, sometimes used for an elongate facial swelling.tuberculate , tuberculose a.tubercula pubertatis (ANN: Oligochaeta) A glandular swellingnear the ventrolateral margin <strong>of</strong> the clitellum <strong>of</strong> matureadult earthworms during copulatory phase; differs in size,shape and continuity.tuberiferous a. [L. dim. tuber, hump; fero, bear] Bearing tu-

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