Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Operculum_(gastropod)> ?p ?o }
- Operculum_(gastropod) abstract "The operculum, meaning little lid, (plural: opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor which exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails. In other words, this structure is found in some marine and freshwater gastropods, and in a minority of terrestrial gastropods, including the families Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc.The operculum is attached to the upper surface of the foot and in its most complete state, it serves as a sort of "trapdoor" to close the aperture of the shell when the soft parts of the animal are retracted. The shape of the operculum varies greatly from one family of gastropods to another. It is fairly often circular, or more or less oval in shape. In species where the operculum fits snugly, its outline corresponds exactly to the shape of the aperture of the shell and it serves to seal the entrance of the shell. A small air-hole may remain to aid respiration, especially during aestivation.Many families have opercula that are reduced in size, and which are not capable of closing the shell aperture. Opercula have sometimes been modified: in the Strombidae the operculum is claw-shaped and is used to push into the substrate in a leaping form of locomotion.Virtually all pulmonate snails are inoperculate, i.e. they do not have an operculum, with the exception of the Amphiboloidea. However, some terrestrial pulmonate species are capable of secreting an epiphragm, a temporary structure that can in some cases serve some of the same functions as an operculum. The epiphragm may be distinguished from the true operculum by its homogeneity and want of growth marks.In ammonites (extinct shelled cephalopods), a calcareous structure known as the aptychus (plural aptychi) existed. When these were first described they were thought to be valves of a bivalve species, then for many years after that they were considered to be a form of paired or single operculum-like structures belonging to ammonites. More recently the aptychus or paired aptychi have been hypothesized to be a jaw apparatus of ammonites.".
- Operculum_(gastropod) thumbnail Lunella_(Ninella)_torquata_002.jpg?width=300.
- Operculum_(gastropod) wikiPageExternalLink index1.html.
- Operculum_(gastropod) wikiPageID "3979362".
- Operculum_(gastropod) wikiPageLength "13442".
- Operculum_(gastropod) wikiPageOutDegree "97".
- Operculum_(gastropod) wikiPageRevisionID "681952457".
- Operculum_(gastropod) wikiPageWikiLink Aciculidae.
- Operculum_(gastropod) wikiPageWikiLink Aestivation.
- Operculum_(gastropod) wikiPageWikiLink Alcohol.
- Operculum_(gastropod) wikiPageWikiLink Ammonite.
- Operculum_(gastropod) wikiPageWikiLink Ammonoidea.
- Operculum_(gastropod) wikiPageWikiLink Amphiboloidea.
- Operculum_(gastropod) wikiPageWikiLink Ampullaria.
- Operculum_(gastropod) wikiPageWikiLink Ampullaria_bicarinata.
- Operculum_(gastropod) wikiPageWikiLink Animal_(book).
- Operculum_(gastropod) wikiPageWikiLink Animal_locomotion.
- Operculum_(gastropod) wikiPageWikiLink Aperture_(mollusc).
- Operculum_(gastropod) wikiPageWikiLink Aptychus.
- Operculum_(gastropod) wikiPageWikiLink Arabian.
- Operculum_(gastropod) wikiPageWikiLink Arabs.
- Operculum_(gastropod) wikiPageWikiLink Bivalve.
- Operculum_(gastropod) wikiPageWikiLink Bivalvia.
- Operculum_(gastropod) wikiPageWikiLink Book_of_Exodus.
- Operculum_(gastropod) wikiPageWikiLink Buccinum.
- Operculum_(gastropod) wikiPageWikiLink Busycon.
- Operculum_(gastropod) wikiPageWikiLink Busycotypus.
- Operculum_(gastropod) wikiPageWikiLink Calcareous.
- Operculum_(gastropod) wikiPageWikiLink Castoreum.
- Operculum_(gastropod) wikiPageWikiLink Category:Incense_material.
- Operculum_(gastropod) wikiPageWikiLink Category:Mollusc_anatomy.
- Operculum_(gastropod) wikiPageWikiLink Charonia.
- Operculum_(gastropod) wikiPageWikiLink Charonia_tritonis.
- Operculum_(gastropod) wikiPageWikiLink China.
- Operculum_(gastropod) wikiPageWikiLink Columella_(gastropod).
- Operculum_(gastropod) wikiPageWikiLink Conch.
- Operculum_(gastropod) wikiPageWikiLink Corneous.
- Operculum_(gastropod) wikiPageWikiLink Cremnoconchus_syhadrensis.
- Operculum_(gastropod) wikiPageWikiLink Cyclophoridae.
- Operculum_(gastropod) wikiPageWikiLink DK_Publishing.
- Operculum_(gastropod) wikiPageWikiLink Desiccation.
- Operculum_(gastropod) wikiPageWikiLink Dorling_Kindersley.
- Operculum_(gastropod) wikiPageWikiLink Epiphragm.
- Operculum_(gastropod) wikiPageWikiLink Epithelial_cell.
- Operculum_(gastropod) wikiPageWikiLink Epithelium.
- Operculum_(gastropod) wikiPageWikiLink Filopaludina_martensi.
- Operculum_(gastropod) wikiPageWikiLink Fish.
- Operculum_(gastropod) wikiPageWikiLink Freshwater_snail.
- Operculum_(gastropod) wikiPageWikiLink Friedrich_Ratzel.
- Operculum_(gastropod) wikiPageWikiLink Fusus.
- Operculum_(gastropod) wikiPageWikiLink Gastropod.
- Operculum_(gastropod) wikiPageWikiLink Gastropoda.
- Operculum_(gastropod) wikiPageWikiLink Gastropods.
- Operculum_(gastropod) wikiPageWikiLink Gemstone.
- Operculum_(gastropod) wikiPageWikiLink Helicinidae.
- Operculum_(gastropod) wikiPageWikiLink Incense.
- Operculum_(gastropod) wikiPageWikiLink Japan.
- Operculum_(gastropod) wikiPageWikiLink Jaw.
- Operculum_(gastropod) wikiPageWikiLink Jew.
- Operculum_(gastropod) wikiPageWikiLink Jews.
- Operculum_(gastropod) wikiPageWikiLink Land_snail.
- Operculum_(gastropod) wikiPageWikiLink Lithoglyphus.
- Operculum_(gastropod) wikiPageWikiLink Littorina.
- Operculum_(gastropod) wikiPageWikiLink Maizaniidae.
- Operculum_(gastropod) wikiPageWikiLink Marstonia_comalensis.
- Operculum_(gastropod) wikiPageWikiLink Middle_East.
- Operculum_(gastropod) wikiPageWikiLink Minoan_civilization.
- Operculum_(gastropod) wikiPageWikiLink Murex.
- Operculum_(gastropod) wikiPageWikiLink Musk.
- Operculum_(gastropod) wikiPageWikiLink Navicella_(gastropod).
- Operculum_(gastropod) wikiPageWikiLink Nerita.
- Operculum_(gastropod) wikiPageWikiLink Northwest_Coast_art.
- Operculum_(gastropod) wikiPageWikiLink Oceania.
- Operculum_(gastropod) wikiPageWikiLink Onycha.
- Operculum_(gastropod) wikiPageWikiLink Paludomus.
- Operculum_(gastropod) wikiPageWikiLink Paperweight.
- Operculum_(gastropod) wikiPageWikiLink Perfume.
- Operculum_(gastropod) wikiPageWikiLink Pomatiidae.
- Operculum_(gastropod) wikiPageWikiLink Predation.
- Operculum_(gastropod) wikiPageWikiLink Predator.
- Operculum_(gastropod) wikiPageWikiLink Pulmonata.
- Operculum_(gastropod) wikiPageWikiLink Pulmonate.
- Operculum_(gastropod) wikiPageWikiLink Purpura_(gastropod).
- Operculum_(gastropod) wikiPageWikiLink Red_Sea.
- Operculum_(gastropod) wikiPageWikiLink Resin.
- Operculum_(gastropod) wikiPageWikiLink Sea_snail.
- Operculum_(gastropod) wikiPageWikiLink Seal_(emblem).
- Operculum_(gastropod) wikiPageWikiLink Snail.
- Operculum_(gastropod) wikiPageWikiLink Strombidae.
- Operculum_(gastropod) wikiPageWikiLink Strombus.
- Operculum_(gastropod) wikiPageWikiLink Terrestrial_animal.
- Operculum_(gastropod) wikiPageWikiLink Thiara_(gastropod).
- Operculum_(gastropod) wikiPageWikiLink Trapdoor.
- Operculum_(gastropod) wikiPageWikiLink Triton_(gastropod).
- Operculum_(gastropod) wikiPageWikiLink Trochus.
- Operculum_(gastropod) wikiPageWikiLink Turbinella.
- Operculum_(gastropod) wikiPageWikiLink Turbinidae.
- Operculum_(gastropod) wikiPageWikiLink Turbo_marmoratus.
- Operculum_(gastropod) wikiPageWikiLink Turbo_petholatus.
- Operculum_(gastropod) wikiPageWikiLink Valve_(mollusc).