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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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<strong>Online</strong> <strong>Dictionary</strong> <strong>of</strong> <strong>Invertebrate</strong> <strong>Zoology</strong> 793proteins.ridge n. [A.S. hrycg] Any raised line or strip on a surface.right valve (MOLL: Bivalvia) When holding the bivalve shellwith the hinge up and the apex or umbo pointed away fromand pallial sinus toward the holder, then the right valve ison the right.rimate a. [L. rima, fissure] 1. Provided with a very narrowcavity; a very small hole or crack. 2. (MOLL: Gastropoda)Referring usually to the umbilicus.rimose a. [L. rima, fissure] Having many clefts or excavations.rind cells The layer <strong>of</strong> nerve cell bodies on the surface <strong>of</strong> invertebrateganglia, consisting <strong>of</strong> perikaryon, glial and neuroncells; not nerve endings or synapses.ring n. [A.S. hring, ring] 1. A circle or annulus; circinate. 2.(ARTHRO: Diplopoda) A non-systematic and colloquial termfor the trunk segments; avoids the need to differentiatebetween single segments and diplosegments.ring canal 1. (CNID: Hydrozoa) A circular canal around themargin <strong>of</strong> the umbrella into which the radial canal join aspart <strong>of</strong> the gastrovascular system. 2. (ECHINOD) A circularpart <strong>of</strong> the water-vascular system encircling the esophagusringed gland (ARTHRO: Insecta) In Hemiptera, a gland, sometimespaired, situated dorsally or ventrally on the vagina,or on the vaginal pouch; sometimes ringed by annualsclerotizations known as ring sclerites.ringent a. [L. ringens, gaping] (MOLL: Bivalvia) Gaping, assome valves.Ringer's solution Used as a physiological saline for vertebratesand invertebrates.ring gland 1. (ARTHRO: Insecta) In higher Diptera, a glandularorgan surrounding the aorta just above the brain, formedby the combining <strong>of</strong> the corpora cardiaca and the corporaallata and the thoracic glands; Weismann's ring. 2. (PLATY:Trematoda) A ring <strong>of</strong> glands opening with the apertureabove to secrete a substance to digest the epidermal cells<strong>of</strong> the host.ring nerve see nerve ring

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