Leptothecata (original) (raw)
Els leptotecats (Leptothecata) són un ordre d'hidrozous de la subclasse Hydroidolina. Els seus parents vius més propers són els antoatecats, que sempre han estat considerats estretament relacionats, i els sifonòfors que fins fa poc no es consideraven parents.
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| dbo:abstract | Els leptotecats (Leptothecata) són un ordre d'hidrozous de la subclasse Hydroidolina. Els seus parents vius més propers són els antoatecats, que sempre han estat considerats estretament relacionats, i els sifonòfors que fins fa poc no es consideraven parents. (ca) Leptothecata es un orden de cnidarios de la clase Hydrozoa. (es) Leptothecata, or thecate hydroids, are an order of hydrozoans in the phylum Cnidaria. Their closest living relatives are the athecate hydroids, which are similar enough to have always been considered closely related, and the very apomorphic Siphonophorae, which were placed outside the "Hydroida". Given that there are no firm rules for synonymy for high-ranked taxa, alternative names like Leptomedusa, Thecaphora or Thecata, with or without the ending emended to "-ae", are also often used for Leptothecata. Leptothecata is surrounded by a chitinous outer layer as its exoskeleton, including gonophores, their reproductive organ. Leptothecata obtain radial symmetry, in which their gonads can be found in their radial canals. Their morphological characters normally have ranged from benthic to planktonic stages. Characters associated with benthic are the polyps and colony forms, while planktonic is medusae. Leptothecata has a vast and complex variation among all species within the hydrozoan clade. Thecata colonies also have extensive specialization due to their polyps function and variation. Most Leptothecata possess statocysts, which are used for defense and protection. The classes that have lost their statocysts have been changed ancestrally over time rather than a direct loss. The approximately 1,900 species of Leptothecata are characterized by a number of features: Their polyps are always living in colonies with the hydranths set in hydrotheca which are usually permanent and often long enough so the animal can fully retract into it; some have very reduced hydrothecae resembling Anthoathecata. There is a single whorl of tentacles. The gonophores are borne on much reduced hydranths and usually protected in a peridermal gonotheca. Medusae forming on fully developed hydranths are extremely rare; usually the gonophores develop into medusae or into sessile sporosacs. The medusae have a shallow bell, bear the gonads on their radial canals, and usually have statocysts which are formed only from epidermal tissue and more than four tentacles and. The never has . (en) Les Leptothecata ou Leptomedusae forment un ordre de cnidaires hydrozoaires. Comme beaucoup de cnidaires, ces animaux alternent entre un stade méduse et un stade polype (ici sous forme de colonies ressemblant à des plumes urticantes), l'un ou l'autre de ces stades pouvant être privilégié suivant les espèces. (fr) Leptothecata is een orde van neteldieren uit de klasse van de Hydrozoa (hydroïdpoliepen). (nl) Leptothecata è un ordine di Hydrozoa. Queste meduse sono dette anche tecati per via della caratteristica : si tratta di un involucro (o guscio) nel quale il polipo si ritrae. (it) Leptothecata är en ordning av nässeldjur. Leptothecata ingår i klassen hydrozoer, fylumet nässeldjur och riket djur. Enligt Catalogue of Life omfattar ordningen Leptothecata 2048 arter. (sv) 软水母目（学名：Leptothecata）為水螅纲的一目动物。 (zh) |
| dbo:thumbnail | wiki-commons:Special:FilePath/Aequorea3.jpeg?width=300 |
| dbo:wikiPageExternalLink | http://www.ville-ge.ch/mhng/hydrozoa/hydrozoa-directory.htm http://www.ville-ge.ch/mhng/hydrozoa/lepto/leptomedusae.htm http://www.marinespecies.org/aphia.php%3Fp=taxdetails&id=13552 http://www.ville-ge.ch/mhng/hydrozoa/intro/phylogeny.htm |
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| dbo:wikiPageLength | 11826 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1120503655 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Melicertidae dbr:Bioluminescent dbr:Anthoathecata dbc:Hydroidolina dbr:Polyp_(zoology) dbr:Sertulariidae dbr:Obelia dbr:Lovenellidae dbr:Epidermis_(skin) dbr:Lafoeidae dbr:Orchistomatidae dbr:Synonym_(biology) dbr:Amphipod dbr:Siphonophorae dbr:Suborder dbr:Haleciidae dbr:Halopterididae dbr:Malagazziidae dbc:Cnidarian_orders dbr:Aglaopheniidae dbr:Hebellidae dbr:Laodiceidae dbr:Lineolariidae dbr:Air_fern dbr:Barcinidae dbr:Parasitic dbr:Dipleurosomatidae dbr:Gonad dbr:Gonophore dbr:Conica_(Hydrozoa) dbr:Taxa dbr:Aequorea_victoria dbr:Aequoreidae dbc:Leptothecata dbr:Blackfordiidae dbr:Eirenidae dbr:Tentacle dbr:Whorl_(biology) dbr:Mitrocomidae dbr:Bonneviellidae dbr:Plumulariidae dbr:Cirrholoveniidae dbr:Clathrozoidae dbr:Hydranth dbr:Hydroida dbr:Hydrotheca dbr:Thyroscyphidae dbr:Tiarannidae dbr:Tiaropsidae dbr:Apomorph dbr:Order_(biology) dbr:Campanulariidae dbr:Campanulinidae dbr:Kirchenpaueriidae dbr:Medusa_(biology) dbr:Species dbr:Octocannoididae dbr:Plumaleciidae dbr:Sugiuridae dbr:Statocyst dbr:Schizotrichidae dbr:Syntheciidae dbr:Symplectoscyphidae dbr:Phylactothecidae dbr:Sertularellidae dbr:Paraphyletic dbr:Plumularioidea dbr:Phialellidae dbr:Phialuciidae dbr:Radial_canal dbr:Staurothecidae dbr:Teclaiidae dbr:Zygophylacidae dbr:Sporosac dbr:Athecate_hydroids dbr:Crystal_Jelly dbr:Hyperia_medusarum dbr:Sertularioidea dbr:File:Halecium-muricatum.jpg dbr:Wikt:gonotheca dbr:Cnidome dbr:Palaequoreidae dbr:Stenotele |
| dbp:authority | Cornelius, 1992 (en) |
| dbp:from | Q138147 (en) Q5122184 (en) |
| dbp:imageCaption | Crystal Jelly with the parasitic amphipod Hyperia medusarum (en) |
| dbp:name | Thecate hydroids (en) |
| dbp:synonyms | * Leptomedusa (Haeckel, 1879) * Leptomedusae (Haeckel, 1879) * Leptothecatae (Cornelius, 1992) * Thecaphora (Hincks, 1868) * Thecaphorae (Hincks, 1868) * Thecata (Fleming, 1828) * Thecatae (Fleming, 1828) (en) |
| dbp:taxon | Leptothecata (en) |
| dbp:wikiPageUsesTemplate | dbt:Aut dbt:Automatic_taxobox dbt:Commons_category dbt:Reflist dbt:Short_description dbt:Taxonbar dbt:Leptothecata-stub |
| dcterms:subject | dbc:Hydroidolina dbc:Cnidarian_orders dbc:Leptothecata |
| rdfs:comment | Els leptotecats (Leptothecata) són un ordre d'hidrozous de la subclasse Hydroidolina. Els seus parents vius més propers són els antoatecats, que sempre han estat considerats estretament relacionats, i els sifonòfors que fins fa poc no es consideraven parents. (ca) Leptothecata es un orden de cnidarios de la clase Hydrozoa. (es) Les Leptothecata ou Leptomedusae forment un ordre de cnidaires hydrozoaires. Comme beaucoup de cnidaires, ces animaux alternent entre un stade méduse et un stade polype (ici sous forme de colonies ressemblant à des plumes urticantes), l'un ou l'autre de ces stades pouvant être privilégié suivant les espèces. (fr) Leptothecata is een orde van neteldieren uit de klasse van de Hydrozoa (hydroïdpoliepen). (nl) Leptothecata è un ordine di Hydrozoa. Queste meduse sono dette anche tecati per via della caratteristica : si tratta di un involucro (o guscio) nel quale il polipo si ritrae. (it) Leptothecata är en ordning av nässeldjur. Leptothecata ingår i klassen hydrozoer, fylumet nässeldjur och riket djur. Enligt Catalogue of Life omfattar ordningen Leptothecata 2048 arter. (sv) 软水母目（学名：Leptothecata）為水螅纲的一目动物。 (zh) Leptothecata, or thecate hydroids, are an order of hydrozoans in the phylum Cnidaria. Their closest living relatives are the athecate hydroids, which are similar enough to have always been considered closely related, and the very apomorphic Siphonophorae, which were placed outside the "Hydroida". Given that there are no firm rules for synonymy for high-ranked taxa, alternative names like Leptomedusa, Thecaphora or Thecata, with or without the ending emended to "-ae", are also often used for Leptothecata. (en) |
| rdfs:label | Leptothecata (en) Leptotecats (ca) Leptothecata (es) Leptothecata (fr) Leptothecata (it) Leptothecata (nl) Leptothecata (sv) 软水母目 (zh) |
| owl:sameAs | wikidata:Leptothecata http://bs.dbpedia.org/resource/Leptothecata dbpedia-ca:Leptothecata http://ceb.dbpedia.org/resource/Leptothecata dbpedia-es:Leptothecata dbpedia-fi:Leptothecata dbpedia-fr:Leptothecata dbpedia-hr:Leptothecata dbpedia-it:Leptothecata dbpedia-nl:Leptothecata dbpedia-sv:Leptothecata dbpedia-war:Leptothecata dbpedia-zh:Leptothecata https://global.dbpedia.org/id/4hca8 |
| prov:wasDerivedFrom | wikipedia-en:Leptothecata?oldid=1120503655&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/Halecium-muricatum.jpg wiki-commons:Special:FilePath/Aequorea3.jpeg |
| foaf:isPrimaryTopicOf | wikipedia-en:Leptothecata |
| is dbo:order of | dbr:Symplectoscyphidae |
| is dbo:wikiPageRedirects of | dbr:Leptomedusae dbr:Leptomedusa dbr:Leptothecatae dbr:Leptothecate dbr:Thecata dbr:Thecatae dbr:Thecate_Hydroid dbr:Thecate_Hydroids dbr:Thecate_hydroid dbr:Thecate_hydroids |
| is dbo:wikiPageWikiLink of | dbr:Melicertidae dbr:2021_in_paleontology dbr:Hydrozoa dbr:List_of_marine_animals_of_the_Cape_Peninsula_and_False_Bay dbr:Obelia_dichotoma dbr:Medusozoa dbr:Siphonophorae dbr:Jellyfish dbr:Hydroidolina dbr:Laomedea dbr:Blackfordiidae dbr:Mitrocomidae dbr:Thyroscyphidae dbr:Tiarannidae dbr:Tiaropsidae dbr:Leptomedusae dbr:Octocannoididae dbr:Proboscidoidea dbr:Sugiuridae dbr:Syntheciidae dbr:Symplectoscyphidae dbr:Paraphyly dbr:Teclaiidae dbr:Leptomedusa dbr:Leptothecatae dbr:Leptothecate dbr:Thecata dbr:Thecatae dbr:Thecate_Hydroid dbr:Thecate_Hydroids dbr:Thecate_hydroid dbr:Thecate_hydroids |
| is dbp:ordo of | dbr:Symplectoscyphidae |
| is foaf:primaryTopic of | wikipedia-en:Leptothecata |
