Cephalochordate

Cephalochordate
Temporal range: Early Cambrian–Recent
PreЄ
Є
O
S
D
C
P
T
J
Pg
N
A Branchiostoma lanceolatum lancelet
Scientific classification
Kinrick: Animalia
Phylum: Chordata
Subphylum: Cephalochordata
Haeckel, 1866[1]
Groups
  • †Pikaiidae Walcott 1911
  • Leptocardii Müller, 1845
    • †Cathaymyrus Shu, Conway Morris & Zhang 1996
    • †Paleobranchiostoma Oelofsen & Loock 1981
    • Branchiostomiformes
      • Asymmetronidae
      • Branchiostomidae Bonaparte 1841
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 durin larval stages an throu tae adultheid. This includes: notocord, dorsal nerve cord, endostyle, pharynx an post-anal tail.[2] Cephalochordates are representit in the modren oceans bi the Amphioxiformes (lancelets, forby kent as amphioxus). Alang wi its sister phylum, Urochordata, Cephalochordata can be clessified as belangin tae the taxon Protochordata.[3]

References

  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.CS1 maint: multiple names: authors leet (link)
  3. ↑ Hickman. Animal Diversity. Michael S. Hackett. p. 313.