Megastomia conoidea

Megastomia conoidea is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Megastomia conoidea
Megastomia conoidea
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Family:	Pyramidellidae
Genus:	Megastomia
Species:	M. conoidea
Binomial name
Megastomia conoidea (Brocchi, 1814)
Synonyms
Eulima monodon Requien, 1848 Odostomia conoidea (Brocchi, 1814) Odostomia var. australis Jeffreys, J.G., 1867 Odostomia eulimoides Jeffreys, J.G., 1847 Odostomia nagli Brusina, S., 1865 Odostomia plica Cantraine, F.J., 1842 Odostomia sicula Philippi, R.A., 1851 Odostomia sulcifera Smith, E.A., 1872 Odostomia tenuis Jeffreys, 1884 Odostomia (Megastomia) boteroi Schander, C., 1994 Odostomia (Megastomia) corimbensis Schander, C., 1994 Odostomia (Megastomia) gilsoni Dautzenberg, Ph., 1912 Odostomia (Megastomia) polita Bivona-Bernardi, A., 1832 Odostomia (Odostomia) plicata Fleming, C.A. Ovatella polita Bivona Ant., 1832 (dubious synonym) Rissoa polita Scacchi, 1836 Turbo conoideus Brocchi, 1814

Description

The shell size varies between 2.5 mm and 7 mm. The white shell is solid, polished and with microscopic growth lines. The periphery is more or less distinctly keeled or angulated, with an impressed spiral line. There are eight, nearly flat whorls. The umbilicus is small and deep. The columellar tooth is strong and prominent. The interior of the outer lip is ridged, terminating in small tubercles within the mouth.

(Description of Odostomia sicula) The white shell is solid and polished. Its length measures 6.25 mm. The eight whorls of the teleoconch are nearly flat. They are marked with microscopic growth lines. The periphery of the shell is more or less distinctly keeled or angulated. The shell shows an impressed spiral line. The small umbilicus goes deep. The columellar tooth is strong and prominent. The interior of the lip is ridged, terminating in small tubercles within the aperture.

G.W. Tryon (1889) considered it a synonym of Odostomia conoidea Brocchi.

Distribution

This species occurs in the following locations:

• Angola
• Canary Islands
• Cape Verde Archipelago
• the Atlantic Ocean (Norway to West Africa, Senegal, Angola)
• São Tomé and Príncipe Archipelagos
• United Kingdom Exclusive Economic Zone
• Mediterranean Sea

References

• Philippi, Zeitsch. fur Malac., p. 88, 1852.
• Requien E. (1848). Catalogue des Coquilles de l'Île de Corse. Seguin, Avignon v-xii, 13-109
• 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
• de Kluijver, M.J.; Ingalsuo, S.S.; de Bruyne, R.H. (2000). Macrobenthos of the North Sea [CD-ROM]: 1. Keys to Mollusca and Brachiopoda. World Biodiversity Database CD-ROM Series. Expert Center for Taxonomic Identification (ETI): Amsterdam, the Netherlands. ISBN 3-540-14706-3. 1 cd-rom
• Rolán E., 2005. Malacological Fauna From The Cape Verde Archipelago. Part 1, Polyplacophora and Gastropoda

External links

• Encyclopedia of Life
• ITIS
• GenBank
• World Register of Marine Species
• "Odostomia (Megastomia) conoidea conoidea". Gastropods.com. Retrieved 7 November 2011.