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Definition of Cephalochordata in English: Cephalochordataplural noun ˌkɛfələ(ʊ)kɔːˈdeɪtəˌsɛfələ(ʊ)kɔːˈdeɪtəˌsefəlōˌkôrˈdätə Zoology A small group of marine invertebrates that comprises the lancelets. 〔动〕头索动物亚门 Subphylum Cephalochordata, phylum Chordata Example sentencesExamples - Deuterostomia are a major group of metazoans composed of three phyla: Chordata (including three subphyla: Vertebrata, Cephalochordata, and Urochordata), Hemichordata, and Echinodermata.
- 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.
- The groups Urochordata, Cephalochordata, and Vertebrata are all currently considered chordates, which has a page as well.
- For this reason, the three subphyla, Urochordata, Cephalochordata, and Vertebrata, will be treated separately.
- The immediate outgroup of craniates, the Cephalochordata, show strong asymmetry during development.
Derivativesnoun ˌsɛfələ(ʊ)ˈkɔːdeɪt A marine invertebrate of the subphylum Cephalochordata; a lancelet. the great similarities between cephalochordates and vertebrates Example sentencesExamples - 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.
- Five major groups are usually recognized within Deuterostomia at the level of phylum: hemichordates, echinoderms, cephalochordates, urochordates, and vertebrates.
OriginModern Latin (plural), from cephalo- 'head' + Greek chorda 'cord'. Definition of Cephalochordata in US English: Cephalochordataplural nounˌsefəlōˌkôrˈdätə Zoology A small group of marine invertebrates comprising the lancelets. 〔动〕头索动物亚门 Subphylum Cephalochordata, phylum Chordata Example sentencesExamples - For this reason, the three subphyla, Urochordata, Cephalochordata, and Vertebrata, will be treated separately.
- The groups Urochordata, Cephalochordata, and Vertebrata are all currently considered chordates, which has a page as well.
- The immediate outgroup of craniates, the Cephalochordata, show strong asymmetry during development.
- Deuterostomia are a major group of metazoans composed of three phyla: Chordata (including three subphyla: Vertebrata, Cephalochordata, and Urochordata), Hemichordata, and Echinodermata.
- 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.
OriginModern Latin (plural), from cephalo- ‘head’ + Greek chorda ‘cord’. |