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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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814Maggenti and Gardnerenclosing the 1st valvulae.second vein (ARTHRO: Insecta) In Diptera, when present, lyingimmediately behind the subcostal vein, always united withthe radial sector vein.secretion n. [L. secretio, separation] A substance or fluid producedin the body by a cell or gland; the passage <strong>of</strong> thissubstance to the outside <strong>of</strong> the cell or gland. secretory a.secretory granules (NEMATA) Proteinaceous granules producedin the salivary (esophageal) glands, then transportedanteriorly to the gland ampullae where breakdown occurs;thought to release digestive enzymes to be injected intothe food cell during feeding.section n. [L. sectare, to cut] 1. Pertaining to a subdivision <strong>of</strong>a taxon or a series <strong>of</strong> related elements in one portion <strong>of</strong> ahigher taxon. 2. A thin slice <strong>of</strong> an organism or part <strong>of</strong> oneused for microscopic study.sectorial cross vein (ARTHRO: Insecta) A cross vein betweenthe two branches <strong>of</strong> the radial sector.secund a. [L. secundus, following] Having parts or organs onone side only; pointed one way; unilateral.secundibracts n. [L. secundus, following; brachium, arm](ECHINOD: Crinoidea) Brachials between the first and 2ndaxillaries; dicostalia.securiform a. [L. securis, ax; forma, shape] Hatchet-shaped.sedentary a. [L. sedere, to sit] Remaining in one place; stationary.seductor gubernaculi see gubernaculumseed n. [A.S. saed, seed] (MOLL: Bivalvia) A young oyster; notdesignated by a specific size range.seed galls (NEMATA) Seedheads converted to galls containingcryptobiotic nematode larvae or adults.segment n. [L. segmentum, piece] 1. A part or subdivision <strong>of</strong> abody or appendage that is marked <strong>of</strong>f or separate betweenjoints or articulations. 2. (ANN) A portion <strong>of</strong> the body, alongthe anteroposterior axis, between two consecutive intersegmentalfurrows and the associated septa. 3. (AR-THRO: Crustacea) A podomere. see article.

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