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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> 913with three rays shorter than the fourth.triage n. [F. a culling] The process <strong>of</strong> grading.triangle n. [L. triangulus, having three angles] (ARTHRO: Insecta)In Odonata, a small triangular cell or group <strong>of</strong> cellsnear the base <strong>of</strong> the wing; discoidal triangle; cardinal cell.triangulate a.triangular plates (ARTHRO: Insecta) In Hymenoptera, the second<strong>of</strong> three pairs <strong>of</strong> movable plates associated with thesting. see quadrate plates, oblong plates.triaulic a. [L. tres, three; aulos, pipe] (MOLL: Gastropoda) Inopisthobranch hermaphroditic snails, the female part havingtwo separate openings and the male part one. see diaulic,monaulic.triaxial symmetry A type <strong>of</strong> symmetry such as biradial- orbilateral symmetry, with three axes known as sagittal, longitudinal,and transverse.triaxon n. [Gr. tries, three; axon, axle] (PORIF) A spicule withthree axes.tribe n. [L. tribus, tribe] A taxonomic category containing agroup intermediate between the genus and the subfamily;names <strong>of</strong> tribes end in -ini.tribocytic organ (PLATY: Trematoda) In Strigeiudea, a glandular,pad-like organ behind the acetabulum.trichite n. [Gr. trix, hair] (PORIF) Hair-like siliceous spicule.trichobothrium n.; pl. -ria [Gr. thrix, hair; bothros, pit] (AR-THRO: Chelicerata) A compound structure <strong>of</strong> many groupsconsisting <strong>of</strong> a small cavity (bothridium) and variouslyshaped setae (bothridial setae) that function as vibro- andanemoreceptors.trichobranchia n.pl. [Gr. thrix, hair; branchia, gill] (ARTHRO:Crustacea) A gill with a series <strong>of</strong> filamentous lateralbranches arising from the main stem or branchial axis.trichobranchiate a.trichocerous a. [Gr. thrix, hair; keras, horn] (PLATY: Trematoda)Pertaining to cercaria having a tail provided with conspicuousspines or bristles.trichodes see tricomes

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