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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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830Maggenti and Gardnerture. siphonal a.siphonal area (MOLL: Bivalvia) The posterior sector <strong>of</strong> the shellsurface, usually demarcated anteriorly by the umbonalridge; secreted at the openings in the mantle edge or elevatedto form siphons.siphonal canal (MOLL: Gastropoda) A tubular or troughlikeextension <strong>of</strong> the aperture for the enclosure <strong>of</strong> the siphon.siphonal fasciole (MOLL: Gastropoda) The curved growth linesnear the foot <strong>of</strong> the columella marking successive positions<strong>of</strong> the siphonal notch.siphonal fold (MOLL: Gastropoda) A ridge corresponding to thesiphonal notch that winds spirally around the columella.siphonal notch (MOLL: Gastropoda) A narrow sinus <strong>of</strong> the aperturalmargin near the base <strong>of</strong> the columella functioningfor protrusion <strong>of</strong> the inhalant siphon.siphonal retractor muscles (MOLL: Bivalvia) Muscles that retractsiphons into the shell.siphonal tube (MOLL: Bivalvia) A tube composed <strong>of</strong> agglutinizedparticles derived from boring and fused to the siphonoplax.see chimney.siphonoglyph n. [Gr. siphon, tube; glyphein, to engrave](CNID: Anthozoa) A special groove or canal from the mouthto the actinopharynx, functioning to circulate fluid throughthe coelenteron.siphonoplax n. [Gr. siphon, tube; plax, plate] (MOLL: Bivalvia)A chitinous or calcareous structure secreted by the mantlediverging or fused to form a tube on the posterior margin<strong>of</strong> the valves; probably for protection <strong>of</strong> the siphons.siphonostomatous a. [Gr. siphon, tube; stoma, mouth](MOLL: Gastropoda) Having the apertural margin notched orformed with a canal for the protrusion <strong>of</strong> the siphon.siphonozooid n. [Gr. siphon, tube; zoon, animal; eidos, form](CNID: Anthozoa) A small, modified polyp with reduced orlacking tentacles, having a well developed siphonoglyph topropel water through the canal system <strong>of</strong> the colony.siphons see gastrozooidsiphuncle n. [Gr. dim. siphon, tube] 1. (ARTHRO: Insecta) see

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