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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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880Maggenti and Gardnersutural plate (MOLL: Polyplacophora) Lamina <strong>of</strong> the articulamentumacross the jugal sinus <strong>of</strong> the intermediate and tailvalve, extending between the sutural laminae.sutural shelf (MOLL: Gastropoda) A horizontally flattened bandthat may contact the adapical suture <strong>of</strong> the whorls.sutural sinus see jugal sinussutural slope (MOLL: Gastropoda) An angle between the sutureand plane perpendicular to the axis; sometimesequated to the sutural angle.suture n. [L. sutura, seam] 1. Line <strong>of</strong> junction <strong>of</strong> 2 parts generallyimmovably connected. 2. (ARTHRO: Crustacea) InCirripedia, a line or seam at the juncture <strong>of</strong> two compartmentalplates; weakly calcified areas <strong>of</strong> the integument forseparation at ecdysis. 3. (ARTHRO: Insecta) Grooves markingthe line <strong>of</strong> fusion <strong>of</strong> two former plates; a narrow membranousarea between sclerites; line <strong>of</strong> juncture <strong>of</strong> elytra inColeoptera. 4. (MOLL: Gastropoda) The continuous spiralline on the shell surface where whorls adjoin. sutural a.swarming n. [A.S. swearm, swarm] (ARTHRO: Insecta) In socialinsects: a. The departure <strong>of</strong> a queen and workers fromthe parental nest to establish a new colony <strong>of</strong> highly eusocialbees. b. In ants and termites, <strong>of</strong>ten applied to themass departure <strong>of</strong> reproductive forms from the nests at thebeginning <strong>of</strong> the nuptial flight.swimmeret n. [A.S. swimman, to swim] (ARTHRO: Crustacea)An abdominal appendage functioning as a swimming organ;pleopod.swimming bell (CNID) Any bell or umbrella-shaped cnidarianthat moves through the water by contractions, especiallySiphonophora; nectocalyx; nectophore.swimming plate (CTENO) A short ridge bearing large fusedcilia, arranged in eight meridional rows that function in locomotion.switch gene The gene influencing the epigenotype to switch toa different developmental pathway.sycon n. [Gr. sykon, fig] (PORIF) A sponge in which the choanocytelayer shows folding accompanied by superficialthickening <strong>of</strong> the mesohyl.

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