Volborthella (original) (raw)
Volborthella tenuis är en ringmaskart som beskrevs av Schmidt 1888. Volborthella tenuis ingår i släktet Volborthella, klassen havsborstmaskar, fylumet ringmaskar och riket djur. Inga underarter finns listade i Catalogue of Life.
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| dbo:abstract | Volborthella is an animal of uncertain classification, whose fossils pre-date 530 million years ago. It has been considered for a period a cephalopod. However discoveries of more detailed fossils showed that Volborthella’s small, conical shell was not secreted but built from grains of the mineral silicon dioxide (silica), and that it was not divided into a series of compartments by septa as those of fossil shelled cephalopods and the living Nautilus are. This illusion was a result of the laminated texture of the organisms' tests. Therefore, Volborthella’s classification is now uncertain.It has been speculated that it may in fact represent a sclerite of a larger organism, on the basis of one specimen; however, it may be premature to accept this hypothesis, as the arrangement of sclerites producing this impression may have occurred by chance. The Ordovician scleritome-bearing , as well as the Halwaxiids, lobopods and echinoderms, demonstrate the diversity of organisms which may produce a scleritome of this nature. The related Campitius was originally suggested to be part of a radula rather than a scleritome, but is now considered a synonym of Volborthella. Volborthella is widespread, and a useful biostratigraphic indicator; it has been found in North America, Greenland, Spitsbergen, and northeastern Europe, and is restricted to Lower Cambrian rocks, appearing before the trilobites and co-existing with them for some time. Volborthella has been described as a 'failed attempt in mineralisation'; it constructed its wall by agglutinating grains of sediment, much like some foramanifera, and declined in conjunction with the origin of truly-biomineralising organisms. However, its similarity to Salterella, which contained embedded sediment grains in its mineralised wall, suggests a possible biological relationship - Salterella may have begun to mineralise its agglutinated wall. Some Volborthella specimens do show taphonomic hints that some form of lightly mineralised sheath may have enclosed its agglutinated shell. (en) Volborthella tenuis är en ringmaskart som beskrevs av Schmidt 1888. Volborthella tenuis ingår i släktet Volborthella, klassen havsborstmaskar, fylumet ringmaskar och riket djur. Inga underarter finns listade i Catalogue of Life. (sv) |
| dbo:thumbnail | wiki-commons:Special:FilePath/StadtmuseumBerlin_Geo...heSammlung_SM-2012-1604.jpg?width=300 |
| dbo:wikiPageID | 21722712 (xsd:integer) |
| dbo:wikiPageLength | 6207 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1090247297 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Carl_Friedrich_Schmidt_(1832) dbc:Enigmatic_prehistoric_animal_genera dbr:Sclerite dbc:Controversial_taxa dbr:Salterella dbr:Radula dbr:Silicon_dioxide dbr:Baltic_region dbr:Agglutination_(biology) dbr:North_America dbr:Greenland dbr:Spitsbergen dbr:Nautilus dbr:Halwaxiids dbr:Taphonomic dbr:Foramanifera dbr:Lower_Cambrian dbr:Glauconitic_sandstone dbr:Biomineralising dbr:Septum_(marine_biology) dbr:Curviconophorus |
| dbp:authority | Schmidt, 1888 (en) |
| dbp:from | Q18519633 (en) Q5150695 (en) |
| dbp:genus | Volborthella (en) |
| dbp:imageCaption | Glauconitic sandstone with Volborthella fossils, from Stadtmuseum Berlin. (en) |
| dbp:parentAuthority | Schmidt, 1888 (en) |
| dbp:species | tenuis (en) |
| dbp:synonyms | ;Genus: * Campitius (Firby & Durham, 1974) ;Species: * Campitius titanius (Firby & Dunham, 1974) * Volborthella conica (Schindewolf, 1934) (en) |
| dbp:wikiPageUsesTemplate | dbt:Reflist dbt:Short_description dbt:Speciesbox dbt:Taxonbar dbt:Fossil_range dbt:Ma |
| dcterms:subject | dbc:Enigmatic_prehistoric_animal_genera dbc:Controversial_taxa |
| rdfs:comment | Volborthella tenuis är en ringmaskart som beskrevs av Schmidt 1888. Volborthella tenuis ingår i släktet Volborthella, klassen havsborstmaskar, fylumet ringmaskar och riket djur. Inga underarter finns listade i Catalogue of Life. (sv) Volborthella is an animal of uncertain classification, whose fossils pre-date 530 million years ago. It has been considered for a period a cephalopod. However discoveries of more detailed fossils showed that Volborthella’s small, conical shell was not secreted but built from grains of the mineral silicon dioxide (silica), and that it was not divided into a series of compartments by septa as those of fossil shelled cephalopods and the living Nautilus are. This illusion was a result of the laminated texture of the organisms' tests. Therefore, Volborthella’s classification is now uncertain.It has been speculated that it may in fact represent a sclerite of a larger organism, on the basis of one specimen; however, it may be premature to accept this hypothesis, as the arrangement of sclerites pr (en) |
| rdfs:label | Volborthella (en) Volborthella tenuis (sv) |
| owl:sameAs | wikidata:Volborthella dbpedia-bg:Volborthella http://ceb.dbpedia.org/resource/Volborthella_tenuis dbpedia-sv:Volborthella dbpedia-war:Volborthella https://global.dbpedia.org/id/4hhFi |
| prov:wasDerivedFrom | wikipedia-en:Volborthella?oldid=1090247297&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/StadtmuseumBerlin_GeologischeSammlung_SM-2012-1604.jpg |
| foaf:isPrimaryTopicOf | wikipedia-en:Volborthella |
| is dbo:wikiPageRedirects of | dbr:Campitius dbr:Volborthellidae dbr:Volborthella_tenuis dbr:Volbortella dbr:Volborthellid |
| is dbo:wikiPageWikiLink of | dbr:Vologdinella dbr:Campitius dbr:Salterella dbr:Salterellidae dbr:Volborthellidae dbr:Mollusca dbr:Agmata dbr:Evolution_of_cephalopods dbr:Evolution_of_molluscs dbr:Sparagmite_Formation dbr:List_of_the_Paleozoic_life_of_California dbr:List_of_the_prehistoric_life_of_California dbr:Volborthella_tenuis dbr:Volbortella dbr:Volborthellid |
| is foaf:primaryTopic of | wikipedia-en:Volborthella |
