Oceanida

Oceanida is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.^[1]

Oceanida
Shell of Oceanida graduata. Origin: Guadeloupe, syntype at National Museum of Natural History, France
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Vanikoroidea
Family:	Eulimidae
Genus:	Oceanida de Folin, 1870
Type species
Oceanida graduata de Folin, 1871
Synonyms[1]
Athleenia Bartsch, 1946 Spiroclimax Mörch, 1875

This genus was described by Léopold de Folin in 1870. These are subtidal snails that are parasitic on echinoderms. 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 displays an auriculate shape. The outer lip is thickened, featuring a sigmoidally margined profile that curves inward towards the suture. The columella is moderately thick, adorned with a funicular cord and exhibiting minimal plication. The protoconch is polished and positioned at a right angle.^[2]

Species

Species within this genus include:^[1]

• 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 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, 1978 - distributed in North America; Western Atlantic Ocean
• Oceanida lampra Melvill, 1918
• Oceanida mindoroensis 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 (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, 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• Oceanida tumerae Laseron, 1955: unpublished combination for Hebeulima tumere Laseron, 1955)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