subphylum Cephalochordata

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Definition
  1. Noun:
    • A taxonomic subphylum within the phylum Chordata: This subphylum comprises small, fish-like marine chordates known for their elongated, lance-shaped bodies. They are characterized by having a notochord that extends the full length of the body into the head region, which is a defining feature of the group.
Usage Examples
  • Noun:
    • The subphylum Cephalochordata includes organisms like the lancelet, Branchiostoma.
    • In evolutionary biology, the subphylum Cephalochordata is studied for insights into early chordate development.
Advanced Usage
  • In scientific classification: The term is used in formal taxonomic hierarchy (Kingdom: Animalia, Phylum: Chordata, Subphylum: Cephalochordata).
    • The specimen was classified under the subphylum Cephalochordata based on its anatomical features.
Variants and Related Words
  • Cephalochordate (n): A member of the subphylum Cephalochordata; a lancelet.
    • The cephalochordate filter-feeds on microscopic organisms.
  • Lancelet (n): The common name for any cephalochordate.
    • Lancelets are often found buried in sandy seabeds.
Synonyms
  • Lancelets: The common name for the organisms within this subphylum.
  • Acrania: An older, less common taxonomic name sometimes used synonymously for this group, referring to the lack of a true skull.
Noun
  1. lancelets

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