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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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384Maggenti and Gardnergasterostome n. [Gr. gaster, stomach; stoma, mouth] (PLATY:Trematoda) Cercaria in which the sucker is on the midventralsurface.gasterotheca n. [Gr. gaster, stomach; theke, case] (ARTHRO:Insecta) Part <strong>of</strong> the theca or pupa case surrounding theabdomen. see somatotheca.gastraea n. [Gr. gaster, stomach] Hypothetical adult ancestor<strong>of</strong> higher animals that all have the gastrula as a commonstage in their early ontogeny.gastraeum n. [Gr. gaster, stomach] The ventral side <strong>of</strong> abody.gastral cavity see spongocoelgastral groove (ARTHRO: Insecta) A longitudinal furrow in themid-line <strong>of</strong> the ventral plate <strong>of</strong> some eggs.gastralia n. [Gr. gaster, stomach] (PORIF: Hexactinellida) Microscleresbeneath the inner cell layer.gastral layer or membrane (PORIF) Choanocytes lining theinternal cavity.gastral ray (PORIF) One <strong>of</strong> the quadriradiates embedded in thewall and projecting into the central gastral cavity.gastric filament (CNID) A filament lined with nematocysts thatkill living prey entering the stomach <strong>of</strong> a jellyfish.gastric grooves (ARTHRO: Crustacea) In Stomatopoda, thelongitudinal pair <strong>of</strong> grooves, extending from the base <strong>of</strong> therostrum to the posterior margin <strong>of</strong> the carapace.gastric mill (ARTHRO: Crustacea) 1. Thickened and calcifiedparts in the cardiac stomach lining composed <strong>of</strong> moveablearticulated ossicles used to break up food. 2. In Acrothoracica,chitinous triturating apparatus in the foregut; masticatorystomach.gastric ossicles (ARTHRO: Crustacea) The teeth <strong>of</strong> the gastricmill.gastric ostium (CNID) Gastric pouch opening <strong>of</strong> jellyfish.gastric pouch (CNID) One <strong>of</strong> four enlargements <strong>of</strong> the stomach<strong>of</strong> a jellyfish.gastric region (ARTHRO: Crustacea) In Decapoda, the median

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