''Oceanida'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of very small parasitic

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine current power * Marine debris * Marine energy * Marine habitats * Mari ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

s or

micromollusk A micromollusc is a shelled mollusc which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine molluscs, although in addition, numerous species of land snails and freshwater molluscs also ...

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Eulimidae Eulimidae is a family of very small parasitic sea snails, marine gastropod mollusks in the superfamily Vanikoroidea. Description These small parasitic snails live on (or in some cases in) the bodies of echinoderms such as sea cucumbers, se ...

. This genus was described by

Léopold de Folin Léopold de Folin (Alexandre Guillaume Léopold de, Marquis de Folin, 28 August 1817 – 5 July 1896) was an author, oceanographer, malacologist and early founder (1871) of the collections which were to become the '' Musée de la mer'' (sea museum ...

in 1870. These are subtidal snails that are parasitic on

echinoderm An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as ...

s. Their length varies between 2 and 3 mm.

Description

(Originally described in Latin as ''Spiroclimax'') The shell exhibits a subcylindrical form, characterized by transparency and a suture that resembles a gently descending spiral staircase. The

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

displays an auriculate shape. The outer

lip The lips are a horizontal pair of soft appendages attached to the jaws and are the most visible part of the mouth of many animals, including humans. Mammal lips are soft, movable and serve to facilitate the ingestion of food (e.g. sucklin ...

is thickened, featuring a sigmoidally margined profile that curves inward towards the suture. The

columella Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire. His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...

is moderately thick, adorned with a funicular cord and exhibiting minimal plication. The

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called " ...

is polished and positioned at a right angle.

Species

Species within this genus include: * '' Oceanida abrejosensis'' Bartsch, 1917 * '' Oceanida confluens'' Bouchet & Warén, 1986 * '' Oceanida corallina'' Hedley, 1912 * '' Oceanida faberi'' De Jong & Coomans, 1988 - the common labeo - found from

Aruba Aruba, officially the Country of Aruba, is a constituent island country within the Kingdom of the Netherlands, in the southern Caribbean Sea north of the Venezuelan peninsula of Paraguaná Peninsula, Paraguaná and northwest of Curaçao. In 19 ...

to Northeast Brazil. * '' Oceanida graduata'' de Folin, 1871 - the shouldered eulima - distributed in North America; Western Atlantic Ocean; synonyms : ''Spiroclimax scalaris'' Mörch, 1875; ''Athleenia burryi'' Bartsch, 1946 * '' Oceanida hypolysina'' Melvill, 1904 * '' Oceanida inglei''

Lyons Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, north ...

, 1978 - distributed in North America; Western Atlantic Ocean * '' Oceanida lampra'' Melvill, 1918 * ''

Oceanida mindoroensis ''Oceanida'' is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae. This genus was described by Léopold de Folin in 1870. These are subtidal snails that are parasitic on echinoderms. ...

'' Adams & Reeve, 1850 * '' Oceanida whitechurchi'' Turton, 1932 ;Species brought into synonymy: * ''Oceanida burryi'' (Bartsch, 1946): synonym of ''Oceanida graduata'' de Folin, 1871 * ''Oceanida catalinensis'' (Bartsch, 1920) : synonym of ''

Pseudosabinella bakeri ''Pseudosabinella'' is a genus of very small ectoparasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae Eulimidae is a family of very small parasitic sea snails, marine gastropod mollusks in the superfamily ...

'' (Bartsch, 1917) * ''Oceanida lepida'' (A. Adams, 1864): synonym of '' Leiostraca pygmaea'' A. Adams, 1864 * ''Oceanida ovalis'' de Folin, 1884: synonym of '' Doliella nitens (Jeffreys, 1870) * ''Oceanida pumila''

A. Adams Arthur Adams (1820 in Gosport, Hampshire – 1878) was an England, English physician and natural history, naturalist. Adams was assistant surgeon Royal Navy on board HMS Samarang (1822), HMS ''Samarang'' during the survey of the islands of ...

, 1864 (taxon unverified- still inquarantine at WoRMS) * ''Oceanida tumerae'' Laseron, 1955: unpublished combination for '' Hebeulima tumere'' Laseron, 1955) * ''Oceanida scalaris'' (Mörch, 1875): synonym of ''Oceanida graduata'' de Folin, 1871

References

* Jong, K. M. de and H. E. Coomans. 1988. ''Marine gastropods from Curaçao, Aruba and Bonaire'' Studies on the Fauna of Curaçao and other Caribbean Islands 69 1-261, 47 pls.
de Folin L. 1870. ''D'une méthode de classification pour les coquilles de la famille des Chemnitzidae''. Annales de la Société Linnéenne du Département du Maine et Loire 12: 191-202
*Folin, L. de. 1871. Nouveau supplément aux mollusques de la Pointe-à-Pitre In: L. de Folin & L. Périer ed. Les Fonds de la Mer 1 263-265, pl. 24 Savy: Paris *Morch, O. A. L. 1875. ''Synopsis molluscorum marinorum Indiarum occidentalium'' Malakozoologische Blätter 22 142–184. * Lyons, W. G. 1978. ''Status of the genus Oceanida DeFolin (Gastropoda: Eulimidae), with a description of a new species'' Proceedings of the Biological Society of Washington 91 539–545. *(.pdf document)

External links

ITISPhoto of ''Oceanida faberi''
{{Taxonbar, from=Q3171231 Eulimidae Gastropod genera