| 单词 | Opisthobranchia |
| 释义 | Opisthobranchia (once / 2954828 pages) n WORD FAMILY Opisthobranchia USAGE EXAMPLESMany Opisthobranchia have by a process of atrophy lost the typical ctenidium and the mantle-skirt, and have developed other organs in their place. Various, Encyclopaedia Britannica, 11th Edit...(2011) They are certainly cousins of nudibranchs, and both are included in the same larger group, Opisthobranchia. New York Times(Aug 10, 2010) The variety of special developments of structure accompanying the atrophy of typical organs in the Opisthobranchia and general degeneration of organization is very great. Various, Encyclopaedia Britannica, 11th Edit...(2011) n gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares Syn|Hyper subclass Opisthobranchia class (biology) a taxonomic group containing one or more orders |
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