释义 |
Definition of Opisthobranchia in English: Opisthobranchiaplural 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.
Origin Modern Latin (plural), from opistho- 'to the rear' + brankhia 'gills'. Definition of Opisthobranchia in US English: Opisthobranchiaplural 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’. |