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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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174Maggenti and GardnerInsecta) A small area between the veins <strong>of</strong> an insect wing,usually a completely enclosed area.'cellules en crois' (PORIF) Non-flagellated cells arranged in atetraradial fashion in the amphiblastula <strong>of</strong> Calcaronea.cell wall A thin, nonliving sheath or pellicle that lies outsidethe plasma membrane <strong>of</strong> certain animal cells; more generallyapplicable to plant cells.celsius n. [Anders Celsius] The name <strong>of</strong> the temperature scalehaving 100 divisions or degrees between freezing (0 ) andboiling (100 ); abbrev. C.; formerly called centigrade.cement n. [L. caementum, chips (now applied to a substanceused as a "binder")] A substance produced by various invertebratesand utilized as an adhesive protective layer.cement gland 1. Any <strong>of</strong> certain glands <strong>of</strong> invertebrates thatsecrete an adhesive substance. 2. (ACANTHO) A gland orglands near the male testes that secretes a binding mediumthat facilitates copulation with the female. 3. (AR-THRO: Crustacea) Specialized dermal cells <strong>of</strong> barnacles thatsecrete the calcareous substance <strong>of</strong> the valves. 4.(NEMATA) see caudal gland. 5. (ROTIF) see pedal glands.cement layer 1. (ARTHRO: Chelicerata) In Acari, the outerlayer <strong>of</strong> cerotegument. 2. (ARTHRO: Insecta) The thin layeroutside the wax <strong>of</strong> certain insect bodies, that may consist<strong>of</strong> tanned protein or a shellac-like substance and mayfunction in protecting the wax or take the form <strong>of</strong> meshworkreservoirs <strong>of</strong> lipids.cement sac That portion <strong>of</strong> an invertebrate oviduct that functionsin covering eggs.cenchrus n.; pl. cenchri [Gr. kenchros, millet] (ARTHRO: Insecta)In Hymenoptera, specialized lobes on the metanotum<strong>of</strong> certain sawflies that contact with rough areas on theunderside <strong>of</strong> the fore wing to hold them in place; sometimesfunctioning as a stridulatory apparatus.cenenchyma see coenenchymacenogenesis, caenogenesis n. [Gr. kainos, recent; genesis,beginning] The repetition <strong>of</strong> phylogeny by ontogeny,caused by heterochrony (temporal displacement), heterotropy(spacial displacement) or larval adaptation. cenoge-

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