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- Metaspriggina abstract "Metaspriggina is a genus of chordate initially known from two specimens in the Middle Cambrian Burgess Shale and 44 specimens found in 2012 at the Marble Canyon bed in Kootenay National Park.Whilst named after the Ediacaran organism Spriggina, later work has shown the two to be unrelated. Metaspriggina is considered to represent a primitive chordate, possibly transitional between cephalochordates and the earliest vertebrates. It lacked fins and had a poorly developed cranium, but did possess two well-developed upward-facing eyes with nostrils behind them.Metaspriggina also possessed a notochord, along with seven pairs of pharyngeal bars, possibly made of cartilage. The largest specimens are 10 centimetres (3.9 in) in length. Originally believed to be free-swimming but occasionally found on the sea floor, the fossils from Marble Canyon showing the presence of eyes and their placement suggests it lived as a filter-feeder swimming above the sea floor. The exceptional preservation at Marble Canyon also preserved muscle detail, showing that the animal moved with a side-to-side swimming motion. In Metaspriggina the myomeral configuration has an additional ventral chevron, and a clear dorsal bend which defines a W-shaped arrangement that is directly comparable to fish.The discovery of pharyngeal bars (gill bars) makes Metaspriggina the oldest known animal to have this feature. The first pair of pharyngeal bars later evolved to form the upper and lower jaws of vertebrates.".
- Metaspriggina kingdom Animal.
- Metaspriggina phylum Chordate.
- Metaspriggina thumbnail Metaspriggina_and_Maripolia.png?width=300.
- Metaspriggina wikiPageExternalLink new-fossil-find-pinpoints-the-origin-of-jaws-in-vertebrates.
- Metaspriggina wikiPageID "18287997".
- Metaspriggina wikiPageLength "4641".
- Metaspriggina wikiPageOutDegree "27".
- Metaspriggina wikiPageRevisionID "690819009".
- Metaspriggina wikiPageWikiLink Animal.
- Metaspriggina wikiPageWikiLink Burgess_Shale.
- Metaspriggina wikiPageWikiLink Cambrian.
- Metaspriggina wikiPageWikiLink Cartilage.
- Metaspriggina wikiPageWikiLink Category:Burgess_Shale_fossils.
- Metaspriggina wikiPageWikiLink Category:Cambrian_fish.
- Metaspriggina wikiPageWikiLink Category:Extinct_chordates.
- Metaspriggina wikiPageWikiLink Cephalochordate.
- Metaspriggina wikiPageWikiLink Chordate.
- Metaspriggina wikiPageWikiLink Craniate.
- Metaspriggina wikiPageWikiLink Ediacaran_biota.
- Metaspriggina wikiPageWikiLink Eye.
- Metaspriggina wikiPageWikiLink Fin.
- Metaspriggina wikiPageWikiLink Jaw.
- Metaspriggina wikiPageWikiLink Kootenay_National_Park.
- Metaspriggina wikiPageWikiLink Marble_Canyon_(Canadian_Rockies).
- Metaspriggina wikiPageWikiLink Nostril.
- Metaspriggina wikiPageWikiLink Notochord.
- Metaspriggina wikiPageWikiLink Pharyngeal_slit.
- Metaspriggina wikiPageWikiLink Seabed.
- Metaspriggina wikiPageWikiLink Skull.
- Metaspriggina wikiPageWikiLink Spriggina.
- Metaspriggina wikiPageWikiLink University_of_Cambridge.
- Metaspriggina wikiPageWikiLink Vertebrate.
- Metaspriggina wikiPageWikiLink File:Metaspriggina.png.
- Metaspriggina wikiPageWikiLinkText "Metaspriggina".
- Metaspriggina binomial "Metaspriggina walcotti".
- Metaspriggina family "Metaspriggiidae".
- Metaspriggina genus "Metaspriggina".
- Metaspriggina imageCaption "An artist's concept of Metaspriggina based on Conway Morris, Caron.".
- Metaspriggina phylum Chordate.
- Metaspriggina regnum "Animalia".
- Metaspriggina species "M. walcotti".
- Metaspriggina unrankedSuperclassis Craniate.
- Metaspriggina wikiPageUsesTemplate Template:Burgess_Shale_species.
- Metaspriggina wikiPageUsesTemplate Template:Cambrian-stub.
- Metaspriggina wikiPageUsesTemplate Template:Chordate-stub.
- Metaspriggina wikiPageUsesTemplate Template:Cite_web.
- Metaspriggina wikiPageUsesTemplate Template:Convert.
- Metaspriggina wikiPageUsesTemplate Template:Fossil_range.
- Metaspriggina wikiPageUsesTemplate Template:Reflist.
- Metaspriggina wikiPageUsesTemplate Template:Taxobox.
- Metaspriggina subject Category:Burgess_Shale_fossils.
- Metaspriggina subject Category:Cambrian_fish.
- Metaspriggina subject Category:Extinct_chordates.
- Metaspriggina hypernym Chordate.
- Metaspriggina type Animal.
- Metaspriggina type Eukaryote.
- Metaspriggina type Species.
- Metaspriggina type Thing.
- Metaspriggina type Q19088.
- Metaspriggina type Q729.
- Metaspriggina comment "Metaspriggina is a genus of chordate initially known from two specimens in the Middle Cambrian Burgess Shale and 44 specimens found in 2012 at the Marble Canyon bed in Kootenay National Park.Whilst named after the Ediacaran organism Spriggina, later work has shown the two to be unrelated. Metaspriggina is considered to represent a primitive chordate, possibly transitional between cephalochordates and the earliest vertebrates.".
- Metaspriggina label "Metaspriggina".
- Metaspriggina sameAs Q140492.
- Metaspriggina sameAs Metaspriggina.
- Metaspriggina sameAs Metaspriggina.
- Metaspriggina sameAs Metaspriggina.
- Metaspriggina sameAs Metaspriggina_walcotti.
- Metaspriggina sameAs Metaspriggina.
- Metaspriggina sameAs m.04cxd6n.
- Metaspriggina sameAs Метасприггина.
- Metaspriggina sameAs Метасприггіна.
- Metaspriggina sameAs Metaspriggina_walcotti.
- Metaspriggina sameAs Q140492.
- Metaspriggina wasDerivedFrom Metaspriggina?oldid=690819009.
- Metaspriggina depiction Metaspriggina_and_Maripolia.png.
- Metaspriggina isPrimaryTopicOf Metaspriggina.