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Definition of Opisthobranchia
1. Noun. Gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares.
Group relationships: Class Gasteropoda, Class Gastropoda, Gasteropoda, Gastropoda
Member holonyms: Nudibranchia, Order Nudibranchia
Generic synonyms: Class
Definition of Opisthobranchia
1. n. pl. A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs.
Lexicographical Neighbors of Opisthobranchia
Literary usage of Opisthobranchia
Below you will find example usage of this term as found in modern and/or classical literature:
1. Text-book of the Embryology of Invertebrates by Eugen Korschelt, Karl Heider, Edward Laurens Mark, William McMichael Woodworth, Matilda Bernard, Martin Fountain Woodward (1900)
"C. opisthobranchia. The ontogeny of various forms of the opisthobranchia has been
studied by many zoologists. The embryonic development and the younger ..."
2. The Encyclopedia Britannica: A Dictionary of Arts, Sciences, Literature and by Hugh Chisholm (1910)
"A shell is possessed in the adult state by but few opisthobranchia. but all pass
... Many opisthobranchia have by a process of atrophy lost the typical ..."
3. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"But in respect of the substitution of other parts for the mantle-skirt and for
the gill which the more degenerate opisthobranchia ex- jn bit, ..."
4. Palæontology--Invertebrate by Henry Woods (1902)
"SUB-ORDER I. opisthobranchia. The gill is placed behind the heart; ... All the
opisthobranchia are marine. The opisthobranchia are divided into two groups:— ..."
5. Text-book of Comparative Anatomy by Arnold Lang, Ernst Heinrich Philipp August Haeckel (1896)
"opisthobranchia. The typical outer organisation of the Gastropoda here suffers
even more varied and thorough modification than in the Pulmonata. ..."
6. Forms of Animal Life: A Manual of Comparative Anatomy : with Descriptions of by George Rolleston, William Hatchett Jackson (1888)
"It may be aborted altogether in the adult of some opisthobranchia, hence termed
... or permanently as in Aplysia among palliate opisthobranchia. ..."
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