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单词 Larvacea
释义

Definition of Larvacea in English:

Larvacea

plural nounlɑːˈveɪʃəlärˈvāSHēə
Zoology
  • A class of minute transparent planktonic animals related to the sea squirts. They have a body that is typically enclosed in a gelatinous ‘house’ that is regularly shed and replaced.

    Example sentencesExamples
    • Within the urochordates, both genes placed Oikopleura (class Larvacea) as the sister group to all other urochordates.

Derivatives

  • larvacean

  • adjective & noun
    Zoology
    • Ascidians and thaliaceans (which, along with the larvaceans, comprise the subphylum Urochordata) display a biphasic life-history with morphologically dissimilar larval and adult body plans.
      Example sentencesExamples
      • Comparisons of rotifer SL RNA sequences with those of nonnematode species, e.g., cestode or larvacean, showed no similarity (data not shown).
      • The larvaceans - free-floating sea squirts that look a bit like tadpoles - live inside the diaphanous mucus nets.
      • This supposition is largely based on data which suggests that, within the urochordates, the directly developing larvaceans are most primitive and the other two chordate subphyla are exclusively directly developing.
      • Other more sophisticated jelly creatures include some mollusks and snails, and tunicates - sea squirts, salps and larvaceans.

Origin

Modern Latin (plural), from larva.

 
 

Definition of Larvacea in US English:

Larvacea

plural nounlärˈvāSHēə
Zoology
  • A class of minute transparent planktonic animals related to the sea squirts. They have a body that is typically enclosed in a gelatinous “house” that is regularly shed and replaced.

    Example sentencesExamples
    • Within the urochordates, both genes placed Oikopleura (class Larvacea) as the sister group to all other urochordates.

Origin

Modern Latin (plural), from larva.

 
 
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更新时间:2024/12/23 10:33:15