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Onoba semicostata
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Rissoidae
Genus:	Onoba
Species:	O. semicostata
Binomial name
Onoba semicostata (Montagu, 1803)
Synonyms
Cingula semicostata (Montagu, 1803) Cingula striata (Adams, 1797) (nomen dubium) Odostomia marionae MacGillivray, 1843 (dubious synonym) Onoba candida (Brown, 1844) Onoba scotiana (Melvill & Standen, 1907) Onoba striata (J. Adams, 1797) (non da Costa, 1778) Pyramis candidus Brown, 1827 (dubious synonym) Pyramis decussatus Brown, 1827 (dubious synonym) Pyramis discors Brown, 1827 (dubious synonym) Rissoa communis Forbes, 1838 (dubious synonym) Rissoa ecostata Michaud, 1830 Rissoa gracilis MacGillivray, 1843 Rissoa minutissima Michaud, 1830 Rissoa peticularis Menke, 1830 Rissoa scotiana Melvill & Standen, 1907 Rissoa striata J. Adams, 1797 Rissoia scotiana Melvill & Standen, 1907 Turbo semicostatus Montagu, 1803 (original combination) Turbo shepeianus J. Adams, 1798 Turbo striatus J. Adams, 1797 (Invalid: junior secondary homonym of Rissoa striata Da Costa, 1778)

Onoba semicostata is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.

Classification

Turbo semicostatus Montagu, 1803 is probably another species than those which is mostly understand by that name. According to Warén Turbo shepeianus could be the valid name for this species found off Belgium. Further research is necessary, therefore we use the more commonly used name Onoba semicostata.

Taxonomy

Janssen (1975) mentioned two subspecies: O. s. semicostata and O. s. aculeus (Gould, 1841). Thorson (1941), Warén (1973, 1974) and Fretter & Graham (1978) are followed who both consider O. s. semicostata and O. s. aculeus as separate species.

Description

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Distribution

This marine species occurs in the Baltic Sea, the North Sea, the Northern and Northeast Atlantic Ocean and in the Mediterranean Sea.

References

1. ^ Onoba semicostata (Montagu, 1803). Gofas, S. (2009). Onoba semicostata (Montagu, 1803). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141320 on 2 November 2010 .

• Montagu, G. (1803) Testacea Britannica or Natural History of British Shells, Marine, Land, and Fresh-water, Including the Most Minute: Systematically Arranged and Embellished with Figures. J. White, London, Vol. 1, xxxvii + 291 pp. and Vol. 2, 293–606 pp.
• Ziegelmeier, E. (1966). Die Schnecken (Gastropoda Prosobranchia) der deutsche Meeresgebiete und brackigen Küstengewässer . Helgol. Wiss. Meeresunters. 13: 1-66
• Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213

• Rissoidae
• Gastropods described in 1803