Cephalochordata (subphylum)
Identification code: 300266512
Español: Cephalochordata (traducció pendent) (subphylum (traducció pendent)) | Català: cefalocordat (subphylum (traducció pendent))
Hierarchy classification:
Narrower term/s
Alternative term/s
- Acrania
- amphioxi
- amphioxus
- amphioxuses
- cephalochorda
- cephalochordates
- Cirrostomi
- lancelet
- lancelets
- Leptocardia
- Leptocardii
Anotations
Scope note:
Small, fishlike marine invertebrates that are probably the closest living relatives of the vertebrates. Their distinguishing characteristics include a notochord that extends the entire body length, with tip anterior to nerve cord; an atrium that is a single cavity with single ventral opening, but no heard; segments that are well developed; a head poorly developed; and no paired fins.
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