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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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256Maggenti and Gardnercruciate a. [L. crux, cross] Crossing; shaped like a cross.cruciform a. [L. crux, cross; forma, shape] Resembling across; cross-shaped.cruciform muscles (MOLL: Bivalvia) Two bundles <strong>of</strong> musclefibers joining valves and intersecting to form a cross.crumena n. [L. crumena, purse] (ARTHRO: Insecta) An internalpouch in the head for retraction <strong>of</strong> mandibular and maxillarybristles.crura n.pl.; sing. crus [L. crus, leg] 1. Any leg-like part. 2.(BRACHIO) A pair <strong>of</strong> prongs (brachidium) extending fromthe cardinalia or septum to support the lophophore. 3.(MOLL) A stalk or peduncle. 4. (NEMATA) Lateral extensions<strong>of</strong> the cuneus <strong>of</strong> the gubernaculum. 5. (PLATY: Turbellaria)Branches <strong>of</strong> the intestine <strong>of</strong> a flatworm. crural a.crura cerebri (ARTHRO: Insecta) The two large nerve cordsconnecting the supra- and subesophageal ganglia.cruralium n. [L. crus, leg] (BRACHIO) A U-shaped ridge <strong>of</strong> thebrachial valve that bears adductor muscles.crural plates (BRACHIO) Vertical plates that attach the crura tothe dorsal valve.crural process (BRACHIO) The pointed portion <strong>of</strong> the crus, directedobliquely inwardly and ventrally.crus sing. <strong>of</strong> cruraCrustacea, crustaceans n.; n.pl. [L. crusta, shell] One <strong>of</strong> thedivisions <strong>of</strong> arthropods, having chitin-encased bodies thatmay or may not be impregnated with calcium salts; containsthe shrimp, crabs, lobsters, barnacles, water fleas,sand hoppers, fish lice, wood lice, sow bugs, pill bugs,scuds and slaters. crustaceous a.crustaformeria see columellacryophilic a. [Gr. kryos, icy cold; philios, loving] Adapted forliving at a low temperature.crypsis n. [Gr. kryptos, hidden] An aspect <strong>of</strong> the appearance <strong>of</strong>organisms whereby they avoid detection by others; camouflage.crypt n. [Gr. kryptos, hidden] A pitlike depression; follicle;

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