Otina ovata

Otina ovata Temporal range: Upper Jurassic–Recent[1] PreЄ Є O S D C P T J K Pg N (range is for Otinidae)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura clade Panpulmonata clade Eupulmonata
Superfamily:	Otinoidea
Family:	Otinidae H. Adams & A. Adams, 1855[2]
Genus:	Otina J. E. Gray, 1847[3]
Species:	O. ovata
Binomial name
Otina ovata (Brown, 1827)[4]
Synonyms[6]
Galericulum ovatum Brown, 1827[4] Helix otis Turton, 1819 Otina otis (Turton, 1819) Otina turtoni Locard, 1886[5]

Otina ovata is a species of small, air-breathing sea snail or sea slug, a marine pulmonate gastropod mollusk in the superfamily Otinoidea.

Otina ovata is the only species in the genus Otina.^[7][8] Otina is the only genus in the family Otinidae.^[8][9]

This family was classified within the clade Eupulmonata, which was within the informal group Basommatophora, according to the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005).^[10]

Various authors have referred some North American fossils to "Otinidae",^[1] but they did not give a genus or species for these records.

Distribution

This species is not common.

It occurs on the coasts of the Northeastern Atlantic Ocean in Western and South-Western Europe:^[11]

• British Isles (South and West coasts):^[11] Great Britain and Ireland
• Belgium^[6]
• Northern France (Manche, Etretat and Atlantic coast)^[11]
• Spain^[11]
• Portugal^[11]
• Sardinia^[11]

The type locality is Devonshire, England.^[12]

Description

The shell is very small.^[11] The shell has 1.5 whorls.^[11] The last whorl is inflated.^[11] The aperture is oval and very large, like in succineids, columellar and parietal sides of the margin thickened.^[11]

The width of the shell is 1.5-3 mm.^[8][11] The height of the shell is 2-5 mm.^[8][11]

The animal cannot withdraw entirely into the shell.^[11] Otina ovata has no tentacles.^[11]

Habitat

This species breathes air and thus it is found intertidally on rocky shores in such places as caves and rocky overhangs.

Otina ovata lives in intertidal zone on rocks, algae and balanoids.^[11] It is often found in empty bivalve shells and moist rock crevices.^[11]

References

This article incorporates public domain text from the reference ^[11]

1. ^ ^{a b} "Family summary for Otinidae". AnimalBase, last modified 16 january 2007, accessed 8 March 2011.
2. ^ Adams H. & Adams A. (1855). The genera of Recent Mollusca arranged according to their organisation, Van Voorst, London. 2(23): 249.
3. ^ Gray J. E. (1847). "A list of the genera of recent Mollusca, their synonyma and types". Proceedings of the Zoological Society of London 15: 129-219.
4. ^ ^{a b} Brown T. (1827). Illustrations of the Conchology of Great Britain and Ireland. Edinburgh, W. H. Lizars, D. Lizars and S. Highley. [vi] + v, 1-65 , 52 plates. Plate 38, fig. 27-28.
5. ^ Locard A. (1886). Prodrome de malacologie française. Catalogue général des mollusques vivants de France. Mollusque marins. Lyon, H. Georg & Paris, Baillière, pp. X + 778. page 88.
6. ^ ^{a b} Gofas, S. (2011). Otina ovata (Brown, 1827). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=140661 on 2011-03-08
7. ^ "Genus summary for Otina". AnimalBase, last modified 16 January 2007, accessed 8 March 2011.
8. ^ ^{a b c d} Glöer P. (2002) Die Süßwassergastropoden Nord- und Mitteleuropas. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp., ISBN 3-925919-60-0, page 259-290.
9. ^ (Czech) de Bruyne R. H. (2004). Encyklopedie ulit a lastur. Rebo Productions, 336 pp., ISBN 80-7234-288-6, page 226.
10. ^ Bouchet P., Rocroi J.-P., Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. (2005). "Classification and nomenclator of gastropod families". Malacologia: International Journal of Malacology (Hackenheim, Germany: ConchBooks) 47 (1-2): 1–397. ISBN 3925919724. ISSN 0076-2997. http://www.archive.org/details/malacologia47122005inst. 
11. ^ ^{a b c d e f g h i j k l m n o p q} "Species summary for Otina ovata". AnimalBase, last modified 28 February 2011, accessed 8 March 2011.
12. ^ "Species taxon summary ovatum Brown, 1827 described in Galericulum", accessed 8 March 2011

External links

• Otina ovata at National Center for Biotechnology Information (NCBI) website.
• photo of the shell of Otina ovata.
• photo of the shell of Otina ovata.
• distribution map