Difference between revisions of "septum"
From ZooTerms (Dictionary of Invertebrate Zoology)
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|lexical category=noun; plural <b>-ta</b> | |lexical category=noun; plural <b>-ta</b> | ||
|etymology=Latin <i>septum</i>, partition | |etymology=Latin <i>septum</i>, partition | ||
| − | |definition=1. Any dividing wall, membrane or partition separating cavities or masses of tissue; a dissepiment. | + | |definition=1. Any dividing [[wall]], [[membrane]] or partition separating cavities or masses of [[tissue]]; a [[dissepiment]]. |
| − | 2. ([[Annelida]]) Two layers of peritoneal cells enclosing muscle fibers, and blood | + | 2. ([[Annelida]]) Two layers of [[peritoneal]] cells enclosing [[muscle fibers]], and [[blood vessel]]s that separate adjacent segments. |
| − | 3. ([[Arthropoda]]: Crustacea) For barnacles, see [[transverse septum]]. | + | 3. ([[Arthropoda]]: [[Crustacea]]) For barnacles, see [[transverse septum]]. |
| − | 4. ([[Brachiopoda]]) Long, narrow, elevation of the secondary (shell) layer, usually bladelike. <i>a.</i> In Articulata, within underlying floor of valve with high, narrow deflections of fibrous calcite starting near the primary layer. <i>b.</i> In Inarticulata, comparable deflections of the shell lamellae. | + | 4. ([[Brachiopoda]]) Long, narrow, elevation of the secondary ([[shell]]) layer, usually bladelike. <i>a.</i> In [[Articulata]], within underlying floor of [[valve]] with high, narrow deflections of fibrous calcite starting near the [[primary]] layer. <i>b.</i> In Inarticulata, comparable deflections of the [[shell]] lamellae. |
| − | 5. ([[Mollusca]]: Cephalopoda) A calcareous tube that supports the siphuncle. | + | 5. ([[Mollusca]]: [[Cephalopoda]]) A [[calcareous]] [[tube]] that supports the [[siphuncle]]. |
| − | 6. ([[Mollusca]]: Gastropoda) A transverse plate secreted with early formed whorls of shell. | + | 6. ([[Mollusca]]: [[Gastropoda]]) A transverse plate secreted with early formed whorls of [[shell]]. |
| + | }} | ||
[[Category:Disambiguation page necessary]] | [[Category:Disambiguation page necessary]] | ||
| + | {{Concept scheme relation | ||
| + | |scheme=Dictionary of Invertebrate Zoology | ||
}} | }} | ||
Latest revision as of 23:42, 13 September 2013
septum (noun; plural -ta; Latin septum, partition): 1. Any dividing wall, membrane or partition separating cavities or masses of tissue; a dissepiment.2. (Annelida) Two layers of peritoneal cells enclosing muscle fibers, and blood vessels that separate adjacent segments.
3. (Arthropoda: Crustacea) For barnacles, see transverse septum.
4. (Brachiopoda) Long, narrow, elevation of the secondary (shell) layer, usually bladelike. a. In Articulata, within underlying floor of valve with high, narrow deflections of fibrous calcite starting near the primary layer. b. In Inarticulata, comparable deflections of the shell lamellae.
5. (Mollusca: Cephalopoda) A calcareous tube that supports the siphuncle.
6. (Mollusca: Gastropoda) A transverse plate secreted with early formed whorls of shell.
