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- Q123252 subject Q8354118.
- Q123252 abstract "Cephalochordata (from Greek: κεφαλή kephalé, "head" and χορδή khordé, "chord") is a chordate subphylum defined by the presence of a notochord that persists throughout life. It is represented in the modern oceans by the Amphioxiformes (lancelets, also known as amphioxus). Along with its sister phylum Urochordata, Cephalochordata can be classified as belonging to the taxon Protochordata.The characteristics of Cephalochordata are that they are marine animals, segmented, and that they possess elongated bodies with a notochord that extends the length of the body and cirri surrounding the mouth for obtaining food. In cephalochordata the notochord extends from head to tail and it persists throughout their life. The members of this subphylum are very small and have no hard parts, making their fossils difficult to find. Fossilized species have been found in very old rocks predating vertebrates. There is famous fossil shale from the Middle Cambrian Burgess Shale of British Columbia, which has yielded Pikaia fossils. Recently a different cephalochordate fossil (Yunnanozoon) has been found in south China. It dates to the early Cambrian period and is the earliest known fossil of the cephalochordate lineage. They have numerous gill slits, and have separate sexes.phylogeny is based on a combination of studies of extinct and extant species.".
- Q123252 kingdom Q729.
- Q123252 phylum Q10915.
- Q123252 synonym "* Acrania (Haeckel, 1866)".
- Q123252 synonym "* Amphioxidei (Bleeker, 1859)".
- Q123252 synonym "* Pharyngobranchii (or Cirrhostomi) (Owen, 1846)".
- Q123252 thumbnail Branchiostoma_lanceolatum.jpg?width=300.
- Q123252 wikiPageWikiLink Q10915.
- Q123252 wikiPageWikiLink Q1153785.
- Q123252 wikiPageWikiLink Q1156226.
- Q123252 wikiPageWikiLink Q1276038.
- Q123252 wikiPageWikiLink Q132401.
- Q123252 wikiPageWikiLink Q165118.
- Q123252 wikiPageWikiLink Q174301.
- Q123252 wikiPageWikiLink Q1974.
- Q123252 wikiPageWikiLink Q200700.
- Q123252 wikiPageWikiLink Q2267046.
- Q123252 wikiPageWikiLink Q243469.
- Q123252 wikiPageWikiLink Q2747865.
- Q123252 wikiPageWikiLink Q48246.
- Q123252 wikiPageWikiLink Q690567.
- Q123252 wikiPageWikiLink Q729.
- Q123252 wikiPageWikiLink Q761505.
- Q123252 wikiPageWikiLink Q8354118.
- Q123252 wikiPageWikiLink Q852085.
- Q123252 wikiPageWikiLink Q9129.
- Q123252 name "Cephalochordata".
- Q123252 phylum Q10915.
- Q123252 regnum "Animalia".
- Q123252 synonyms "* Pharyngobranchii (Owen, 1846) * Amphioxidei (Bleeker, 1859) * Acrania (Haeckel, 1866)".
- Q123252 type Animal.
- Q123252 type Eukaryote.
- Q123252 type Species.
- Q123252 type Thing.
- Q123252 type Q19088.
- Q123252 type Q729.
- Q123252 comment "Cephalochordata (from Greek: κεφαλή kephalé, "head" and χορδή khordé, "chord") is a chordate subphylum defined by the presence of a notochord that persists throughout life. It is represented in the modern oceans by the Amphioxiformes (lancelets, also known as amphioxus).".
- Q123252 label "Cephalochordate".
- Q123252 depiction Branchiostoma_lanceolatum.jpg.
- Q123252 name "Cephalochordata".