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单词 Opisthobranchia
释义

Definition of Opisthobranchia in English:

Opisthobranchia

plural nounəˌpɪsθə(ʊ)ˈbraŋkɪəəˌpisTHəˈbraNGkēə
Zoology
  • A group of molluscs which includes the sea slugs and sea hares. They have a small or absent shell and are typically brightly coloured with conspicuous external gills.

    Subclass Opisthobranchia, class Gastropoda

    Example sentencesExamples
    • In fact, as with the Opisthobranchia, shell reduction has occurred independently a number of times in different lineages.
    • However, as with Tritonia, many other members of the subclass Opisthobranchia also exhibit swimming behavior.
    • The latter group includes radically modified animals, the Opisthobranchia and Pulmonata, which undergo detorsion and essentially re-evolve bilateral symmetry.
    • The differences in protoconch shape may prove insufficient to differentiate Allogastropoda and shell-bearing Opisthobranchia.
    • In the traditional classification system, the class Gastropoda has been divided into three subclasses, Prosobranchia, Pulmonata, and Opisthobranchia.

Derivatives

  • opisthobranch

  • noun əˈpɪsθə(ʊ)braŋkəˈpɪsθoʊˌbræŋk
    Zoology
    • A marine mollusc of a group that includes the sea slugs and sea hares. They have a small or absent shell and are typically brightly coloured with conspicuous external gills.

      Subclass Opisthobranchia, class Gastropoda

      Despite their apparent common origin and similarities in nervous system organization, the opisthobranchs display a wide variety of body forms and locomotory behaviors.
      Example sentencesExamples
      • Thus, the opisthobranchs exhibit a great diversity of swimming behaviors.
      • The opisthobranchs include the sea slugs and their relatives the sea hares, sea butterflies, canoe shells, and others.

Origin

Modern Latin (plural), from opistho- 'to the rear' + brankhia 'gills'.

 
 

Definition of Opisthobranchia in US English:

Opisthobranchia

plural nounəˌpisTHəˈbraNGkēə
Zoology
  • A group of mollusks which includes the sea slugs and sea hares. They have a small or absent shell and are typically brightly colored with conspicuous external gills.

    Subclass Opisthobranchia, class Gastropoda

    Example sentencesExamples
    • The latter group includes radically modified animals, the Opisthobranchia and Pulmonata, which undergo detorsion and essentially re-evolve bilateral symmetry.
    • In fact, as with the Opisthobranchia, shell reduction has occurred independently a number of times in different lineages.
    • In the traditional classification system, the class Gastropoda has been divided into three subclasses, Prosobranchia, Pulmonata, and Opisthobranchia.
    • The differences in protoconch shape may prove insufficient to differentiate Allogastropoda and shell-bearing Opisthobranchia.
    • However, as with Tritonia, many other members of the subclass Opisthobranchia also exhibit swimming behavior.

Origin

Modern Latin (plural), from opistho- ‘to the rear’ + brankhia ‘gills’.

 
 
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更新时间:2024/12/23 19:54:04