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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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188Maggenti and Gardneror appearance.chalimus stage (ARTHRO: Crustacea) In Monstrilloida, a larvalinfective stage that fixes to the host with a frontal filament;parasites <strong>of</strong> various marine invertebrates.challenge n. [OF. chalangier, contest] The testing <strong>of</strong> inducedimmunity <strong>of</strong> a potential host by exposure to parasites afterimmunization.chalone n. [Gr. chalinos, to curb] Any internal secretion withinhibitory actions. see hormone.chalybeate, chalybeatus, chalybeous, chalybeus a. [Gr.chalybos, steel] Metallic steel-blue in color.chambered a. [Gr. kamara, chamber or vault with archedro<strong>of</strong>] Having divisions or provided with a chamber.chambered organ (ECHINOD: Crinoidea) A five chamberedstructure, encased in the cup-like cavity <strong>of</strong> the aboral nervoussystem; connecting canals form the nerves <strong>of</strong> the stalkand cirri.chank n. [Hind. cankh, conch shell] (MOLL: Gastropoda) Apear- or top-shaped shell utilized as ornaments and banglesand held sacred by the Hindus (the Xancus pyrum andthe pear Turbinella ).channeled, channelled a. [L. canalis, groove] Having furrows,grooves or channels; directed into or along a channel.chaperon see clypeuschaplet n. [OF. chapel, hat] 1. A small crown. 2. A terminalprocess in the form <strong>of</strong> a circle <strong>of</strong> hooks or similar structures.character n. [Gr. charassein, to make clear] A distinguishingfeature, trait or property <strong>of</strong> an organism that distinguishesa member from a different group or taxon; taxonomiccharacter.character displacement A divergence <strong>of</strong> equivalent charactersin a sympatric species due to the selective effects <strong>of</strong>competition. see character divergence.character divergence A name given by Darwin to the differencesdeveloping in two or more related species in theirarea <strong>of</strong> sympatry resulting from selective effects <strong>of</strong> compe-

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