Ondina obliqua explained

Ondina obliqua is a rare species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.^{[1] [2]}

Description

The shell reaches a length of 2.5 mm to 5 mm. The very thin, whitish shell has a transparent, glossy appearance. It has a typical intorted protoconch. The teleoconch contains five whorls, marked with fine, close spiral striae, becoming coarser on the base. The suture is deep and oblique. The outer lip is flexuous, retreating, sinuated above. It is smooth within. The columellar tooth shows only a slight obscure fold. There is no umbilicus or a very small umbilical chink.^[3]

Distribution

This species occurs in the following locations:

• European waters (from South Scandinavia to the Bay of Biscay)
• Portuguese Exclusive Economic Zone
• Spanish Exclusive Economic Zone
• United Kingdom Exclusive Economic Zone
• Mediterranean Sea
• Atlantic Ocean : Madeira., Canary Islands

References

• Templado, J. and R. Villanueva 2010 Checklist of Phylum Mollusca. pp. 148–198 In Coll, M., et al., 2010. The biodiversity of the Mediterranean Sea: estimates, patterns, and threats. PLoS ONE 5(8):36pp.
• van Aartsen J. J., 1987 : European Pyramidellidae: III. Odostomia and Ondina, Bollettino Malacologico, 23 (1-4): 1-34

External links

• Biodiversity Heritage Library (2 publications)
• CLEMAM
• Encyclopedia of Life
• World Register of Marine Species

Notes and References

1. Gofas, S. (2011). Ondina obliqua (Alder, 1844). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141036 on 2012-01-12
2. 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
3. https://archive.org/stream/manualconch08tryorich#page/n5/mode/2up G.W. Tryon, Manual of Conchology vol. VIII, p. 350; 1886