Cephalochordata
/ˌsɛfələ(ʊ)kɔːˈdeɪtə
/ /ˌkɛfələ(ʊ)kɔːˈdeɪtə/plural noun Zoology
A small group of marine invertebrates that comprises the lancelets.
- Subphylum Cephalochordata, phylum Chordata.
- Although this classification is widely accepted, some authors recognize three chordate phyla: Urochordata for the urochordates, Cephalochordata for the lancelets, and Vertebrata for the vertebrates.
- Deuterostomia are a major group of metazoans composed of three phyla: Chordata (including three subphyla: Vertebrata, Cephalochordata, and Urochordata), Hemichordata, and Echinodermata.
Derivatives
cephalochordate
- Five major groups are usually recognized within Deuterostomia at the level of phylum: hemichordates, echinoderms, cephalochordates, urochordates, and vertebrates.
- Comparative developmental studies of chordates have demonstrated that these regulatory genes are expressed in a conserved manner across the spectrum of body plans displayed by urochordates, cephalochordates and vertebrates.
- Also, unlike the vertebrate and cephalochordate genes, the ascidian homologues are not detected in mesodermal tissues.
Origin
Modern Latin (plural), from cephalo- 'head' + Greek chorda 'cord'.
- sub-Aftonian
- subagency
- subagent
- subagitation
- subah
- subahship
- subak
- subalar
- subalgebra
- sub-almoner
- subalpine
- subalpine warbler
- subaltern
- subalternant
- subalternate
- subalternated
- subalternately
- subalternating
- subalternation
- subalternise
- subalternity
- subalternize
- subaltern opposition
- subaltern's butter
- subalterns' butter