Cephalochordate

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Cephalochordate
Temporal range: Early Cambrian–Recent
Branchiostoma lanceolatum.jpg
A Branchiostoma lanceolatum lancelet
Scienteefic clessification
Kinrick: Animalia
Phylum: Chordata
Subphylum: Cephalochordata
Haeckel, 1866[1]
Groups
Synonyms
  • Pharyngobranchii (or Cirrhostomi) Owen, 1846
  • Amphioxidei Bleeker, 1859
  • Acrania Haeckel, 1866

A cephalochordate (frae Greek: κεφαλή kephalé, "heid" an χορδή khordé, "chord") is an ainimal in the chordate subphylum, Cephalochordata. Thay are chairacterised as chordates, as thay possess aw 5 o the chordate chairacteristics during larval stages an throu tae adulthuid. This includes: notocord, dorsal nerve cord, endostyle, pharynx an post-anal tail.[2] Cephalochordates are representit in the modren oceans bi the Amphioxiformes (lancelets, an aa kent as amphioxus). Alang wi its sister phylum, Urochordata, Cephalochordata can be clessified as alangin tae the taxon Protochordata.[3]

References[eedit | eedit soorce]

  1. Nielsen, C. (Julie 2012). "The authorship of higher chordate taxa". Zoologica Scripta. 41 (4): 435–436. doi:10.1111/j.1463-6409.2012.00536.x. 
  2. Fishbeck, D. Sebastiani, A. (2015). Comparative Anatomy: manual of dissection. Morton Publisher Company. 
  3. Hickman. Animal Diversity. Michael S. Hackett. p. 313.