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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 lancelet is a small, translucent, fish-like animal that is one of the closest living invertebrate relatives of the vertebrates [ 80 ] [ 81 ] The lancelets were traditionally seen as the sister lineage to the vertebrates ; in turn, these two groups together (sometimes called Notochordata) were considered the sister group to the Tunicata
  • Lancelet - AnimalFact. com
    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
  • Cephalochordate - Anatomy, Physiology, Evolution | Britannica
    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 The cephalochordate commonly is buried in the substrate and positions its mouth above the surface of the sand
  • Cephalochordata (Lancelets) - Encyclopedia. com
    Cephalochordates (also called acraniates or lancelets) possess key features that characterize them as chordates Those characters include the notochord, dorsal nerve cord, branchial basket, and a post anal tail with fins It is generally believed that cephalochordates are the closest living relatives to the vertebrates
  • Lancelets (Subphylum Cephalochordata) · iNaturalist
    A cephalochordate (from Greek: κεφαλή kephalé, "head" and χορδή khordé, "chord") is an animal in the chordate subphylum, Cephalochordata They are characterized as chordates, as they possess all 5 characteristics of the chordates, during larval stages and through to adulthood
  • Lancelet - Simple English Wikipedia, the free encyclopedia
    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 The lancelets are usually said to be the sister group of the craniates
  • Lancelet | definition of lancelet by Medical . . . - Medical Dictionary
    A genus of small, translucent, fishlike chordates found in warm marine waters Members are structurally similar to vertebrates in having a notochord, gills, digestive tract, and nerve cord, but they lack paired fins, vertebrae, ribs, or a skull for example, Branchiostoma lanceolatum [amphi- + G oxys, sharp]
  • Cephalochordata: Subphylum Of The Ancient Lancelets
    The lancelet body is designed with three openings: a mouth – guarded by tentacles – called buccal cirri and through which water enters, an atriopore – towards the posterior (tail) end of the animal – through which water exits
  • Lancelet: Phylogeny, Environment, Adaptations, and Selective Pressures . . .
    Lancelets are fish-like organisms from the chordate family They belong to the genus Branchiostoma and their scientific name is Branchiostoma lanceolatum A lancelet’s most prominent feature is its notochord, an evolutionary trait that is synonymous with the chordates Although lancelets resemble fish, they belong to the category of invertebrates
  • Lancelet | Encyclopedia. com
    lancelet, name for small, fishlike lower chordate (see Chordata [1]), also called amphioxus; it shows many affinities with the vertebrates There are about 30 lancelet species, most belonging to the genus Brachiostoma (formerly Amphioxus)





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