Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Cnidaria> ?p ?o }
- Cnidaria abstract "Cnidaria (/naɪˈdɛəriə/) is a phylum containing over 10,000 species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick. They have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Both forms have a single orifice and body cavity that are used for digestion and respiration. Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids (hence they are trimorphic), or both. Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors. Several free-swimming Cubozoa and Scyphozoa possess balance-sensing statocysts, and some have simple eyes. Not all cnidarians reproduce sexually, with many species having complex life cycles of asexual polyp stages and sexual medusae. Some, however, omit either the polyp or the medusa stage.Cnidarians were formerly grouped with ctenophores in the phylum Coelenterata, but increasing awareness of their differences caused them to be placed in separate phyla. Cnidarians are classified into four main groups: the almost wholly sessile Anthozoa (sea anemones, corals, sea pens); swimming Scyphozoa (jellyfish); Cubozoa (box jellies); and Hydrozoa, a diverse group that includes all the freshwater cnidarians as well as many marine forms, and has both sessile members, such as Hydra, and colonial swimmers, such as the Portuguese Man o' War. Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and there is debate about whether Myxozoa and Polypodiozoa are cnidarians or closer to bilaterians (more complex animals).Most cnidarians prey on organisms ranging in size from plankton to animals several times larger than themselves, but many obtain much of their nutrition from endosymbiotic algae, and a few are parasites. Many are preyed on by other animals including starfish, sea slugs, fish and turtles. Many scleractinian corals—which form the structural foundation for coral reefs—possess polyps that are filled with endosymbiotic algae. While reef-forming corals are almost entirely restricted to warm and shallow marine waters, other cnidarians can be found at great depths, in polar regions, and in freshwater.Fossil cnidarians have been found in rocks formed about 580 million years ago, and other fossils show that corals may have been present shortly before 490 million years ago and diversified a few million years later. Fossils of cnidarians that do not build mineralized structures are very rare. Scientists currently think that cnidarians, ctenophores and bilaterians are more closely related to calcareous sponges than these are to other sponges, and that anthozoans are the evolutionary \"aunts\" or \"sisters\" of other cnidarians, and the most closely related to bilaterians.".
- Cnidaria domain Eukaryote.
- Cnidaria kingdom Animal.
- Cnidaria kingdom Eumetazoa.
- Cnidaria thumbnail Sea_nettles.jpg?width=300.
- Cnidaria wikiPageExternalLink Anemone2.
- Cnidaria wikiPageExternalLink tree?group=Cnidaria&contgroup=Animals.
- Cnidaria wikiPageExternalLink watch?v=6zJiBc_N1Zk.
- Cnidaria wikiPageExternalLink watch?v=WmvjGc2bojk.
- Cnidaria wikiPageExternalLink default.html.
- Cnidaria wikiPageExternalLink index.php?globalnav=fossil_gallery§ionnav=search&taxon_id=55&state_id=&period_id=&assemblage_id=&last_section=search&p=0.
- Cnidaria wikiPageExternalLink Zrz.pdf.
- Cnidaria wikiPageExternalLink www.tafi.org.au.
- Cnidaria wikiPageExternalLink index.html.
- Cnidaria wikiPageExternalLink Fautin.pdf.
- Cnidaria wikiPageExternalLink Kass-Simon.pdf.
- Cnidaria wikiPageExternalLink Mackie.pdf.
- Cnidaria wikiPageExternalLink hydrozoa-directory.htm.
- Cnidaria wikiPageID "6621".
- Cnidaria wikiPageLength "73679".
- Cnidaria wikiPageOutDegree "465".
- Cnidaria wikiPageRevisionID "708060540".
- Cnidaria wikiPageWikiLink Adhesive.
- Cnidaria wikiPageWikiLink Algae.
- Cnidaria wikiPageWikiLink Ammonia.
- Cnidaria wikiPageWikiLink Amoeba_(genus).
- Cnidaria wikiPageWikiLink Amphiprioninae.
- Cnidaria wikiPageWikiLink Andrew_Dalby.
- Cnidaria wikiPageWikiLink Animal.
- Cnidaria wikiPageWikiLink Anthozoa.
- Cnidaria wikiPageWikiLink Antioxidant.
- Cnidaria wikiPageWikiLink Aquarium.
- Cnidaria wikiPageWikiLink Arctic.
- Cnidaria wikiPageWikiLink Asexual_reproduction.
- Cnidaria wikiPageWikiLink Atmosphere_(unit).
- Cnidaria wikiPageWikiLink Bacteria.
- Cnidaria wikiPageWikiLink Bark.
- Cnidaria wikiPageWikiLink Basement_membrane.
- Cnidaria wikiPageWikiLink Berthold_Hatschek.
- Cnidaria wikiPageWikiLink Bilateria.
- Cnidaria wikiPageWikiLink Biochemistry.
- Cnidaria wikiPageWikiLink Biomineralization.
- Cnidaria wikiPageWikiLink Blastula.
- Cnidaria wikiPageWikiLink Body_orifice.
- Cnidaria wikiPageWikiLink Box_jellyfish.
- Cnidaria wikiPageWikiLink Brain.
- Cnidaria wikiPageWikiLink Brine_shrimp.
- Cnidaria wikiPageWikiLink Butterflyfish.
- Cnidaria wikiPageWikiLink Calcareous_sponge.
- Cnidaria wikiPageWikiLink Calcium_carbonate.
- Cnidaria wikiPageWikiLink Cambrian.
- Cnidaria wikiPageWikiLink Carbon_dioxide.
- Cnidaria wikiPageWikiLink Cartwheel_(gymnastics).
- Cnidaria wikiPageWikiLink Category:Animal_phyla.
- Cnidaria wikiPageWikiLink Category:Articles_containing_video_clips.
- Cnidaria wikiPageWikiLink Category:Cnidarians.
- Cnidaria wikiPageWikiLink Category:Ediacaran_first_appearances.
- Cnidaria wikiPageWikiLink Cell_(biology).
- Cnidaria wikiPageWikiLink Central_nervous_system.
- Cnidaria wikiPageWikiLink Cerianthria.
- Cnidaria wikiPageWikiLink Charnia.
- Cnidaria wikiPageWikiLink Chemical_synapse.
- Cnidaria wikiPageWikiLink Chironex.
- Cnidaria wikiPageWikiLink Chironex_fleckeri.
- Cnidaria wikiPageWikiLink Chitin.
- Cnidaria wikiPageWikiLink Cholesterol.
- Cnidaria wikiPageWikiLink Chondrophore.
- Cnidaria wikiPageWikiLink Chordate.
- Cnidaria wikiPageWikiLink Chrysaora_fuscescens.
- Cnidaria wikiPageWikiLink Cilium.
- Cnidaria wikiPageWikiLink Circulatory_system.
- Cnidaria wikiPageWikiLink Class_(biology).
- Cnidaria wikiPageWikiLink Cnidaria.
- Cnidaria wikiPageWikiLink Cnidocyte.
- Cnidaria wikiPageWikiLink Coelenterata.
- Cnidaria wikiPageWikiLink Colloblast.
- Cnidaria wikiPageWikiLink Colony_(biology).
- Cnidaria wikiPageWikiLink Concentration.
- Cnidaria wikiPageWikiLink Conulariida.
- Cnidaria wikiPageWikiLink Coral.
- Cnidaria wikiPageWikiLink Coral_reef.
- Cnidaria wikiPageWikiLink Cornea.
- Cnidaria wikiPageWikiLink Cretaceous–Paleogene_extinction_event.
- Cnidaria wikiPageWikiLink Crown-of-thorns_starfish.
- Cnidaria wikiPageWikiLink Ctenophora.
- Cnidaria wikiPageWikiLink DNA.
- Cnidaria wikiPageWikiLink Delicacy.
- Cnidaria wikiPageWikiLink Demosponge.
- Cnidaria wikiPageWikiLink Diffusion.
- Cnidaria wikiPageWikiLink Diploblasty.
- Cnidaria wikiPageWikiLink Doushantuo_Formation.
- Cnidaria wikiPageWikiLink Dynamite.
- Cnidaria wikiPageWikiLink East_Asia.
- Cnidaria wikiPageWikiLink Ectoderm.
- Cnidaria wikiPageWikiLink Ediacaran.
- Cnidaria wikiPageWikiLink Egg_cell.
- Cnidaria wikiPageWikiLink Endosymbiont.
- Cnidaria wikiPageWikiLink Enzyme.
- Cnidaria wikiPageWikiLink Epithelium.
- Cnidaria wikiPageWikiLink Erosion.