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lancelet    音标拼音: [l'ænslət]
n. 蜗蝓鱼

蜗蝓鱼

lancelet
n 1: small translucent lancet-shaped burrowing marine animal;
primitive forerunner of the vertebrates [synonym: {lancelet},
{amphioxus}]


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  • Lancelet - Wikipedia
    The term "amphioxus" is still used as a common name along with "lancelet", especially in the English language All extant lancelets are all placed in the family Branchiostomatidae, class Leptocardii, and subphylum Cephalochordata
  • Lancelet - Shape, Examples, Characteristics, Anatomy, Classification
    Lancelets, or amphioxi, are tiny, fish-like marine organisms that belong to the subphylum Cephalochordata, in the class Leptocardii They get their name ‘lancelets’ due to their slender, elongated body that tapers to a point at both ends, resembling the shape of a tiny sword or lance
  • Introduction to the Cephalochordata
    Known as lancelets or as amphioxus (from the Greek for "both [ends] pointed," in reference to their shape), cephalochordates are small, eel-like, unprepossessing animals that spend much of their time buried in sand
  • Cephalochordate - Anatomy, Physiology, Evolution | Britannica
    Various areas of the body surface, including some near the mouth, detect chemicals in the water and thereby aid in feeding Lancelets are suspension feeders that extract small particles suspended in the water The mouth is covered by an oral hood, the edges of which form the buccal cirri
  • Lancelets: Cephalochordata - Encyclopedia. com
    Paired fin-like folds in front of the belly fin extend to the front of the lancelet Lancelets have a notochord (NOH-tuh-koord), which is a flexible rod of cells supporting the body The rest of the skeleton is made up of small, flexible rods between the gill slits and supporting the mouth bristles
  • What Are Lancelets and Why Are They Important?
    Lancelets are suspension feeders, filtering small particles from the water They use cilia, hair-like structures, that line their pharyngeal slits and oral hood to create a water current This current draws water, along with small organisms and organic debris, into their mouth
  • Lancelet (Branchiostoma lanceolatum) - MarLIN - The Marine Life . . .
    The lancelet Branchiostoma lanceolatum is spindle-shaped and pointed at both ends The body is segmented and flattened dorsoventrally with a membranous flipper along the dorsal side
  • Lancelet Explained
    Lancelets contain many organs and organ systems that are homologous to those of modern fish, but in a more primitive form Therefore, they provide a number of examples of possible evolutionary exaptation For example, the gill-slits of lancelets are used for feeding only, and not for respiration
  • Lancelet - Definition, Usage Quiz | UltimateLexicon. com
    Definition Lancelet (noun): A small elongated marine animal belonging to the subphylum Cephalochordata, closely related to vertebrates Lancelets retain essential characteristics of the phylum Chordata, such as a notochord that extends the length of the body
  • Lancelet - Simple English Wikipedia, the free encyclopedia
    Lancelet The lancelets, also known as Cephalochordata or Leptocardii, are a group of primitive chordates which were formerly called Amphioxus It includes Pikaia Lancelets are the modern survivors of an ancient chordate lineage, with a fossil record dating back to the Cambrian period





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