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单词 Cephalochordata
释义

Cephalochordata

/ˌsɛfələ(ʊ)kɔːˈdeɪtə / /ˌkɛfələ(ʊ)kɔːˈdeɪtə/
plural noun Zoology
A small group of marine invertebrates that comprises the lancelets.
  • Subphylum Cephalochordata, phylum Chordata.
For this reason, the three subphyla, Urochordata, Cephalochordata, and Vertebrata, will be treated separately....
  • 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

/ˌsɛfələ(ʊ)ˈkɔːdeɪt/ /ˌkɛfələ(ʊ)ˈkɔːdeɪt/ noun & adjective ...
  • 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'.

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更新时间:2025/3/22 13:01:03