Turbonilla hipolitensis
| Turbonilla hipolitensis | |
|---|---|
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| Drawing of a shell of Turbonilla hipolitensis | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | Pyramidellidae |
| Genus: | Turbonilla |
| Species: | T. hipolitensis
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| Binomial name | |
| Turbonilla hipolitensis Dall & Bartsch, 1909[1]
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| Synonyms | |
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Turbonilla (Dunkeria) hipolitensis Dall & Bartsch, 1909 | |
Turbonilla hipolitensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[2][3]
Description
[edit]The milk-white shell has a light yellow narrow band midway between the sutures. Its length measures 3.3 mm. The 2½ whorls of the protoconch are small. They form a depressed helicoid spire, whose axis is at right angles to that of the succeeding turns, in the first of which it is about one-third immersed. The seven whorls of the teleoconch are moderately rounded. They are slightly shouldered at the summit but very slightly protracted at the suture. They are marked by moderately strong, rounded, retractive axial ribs, of which 18 occur upon the second, 20 upon the third, 24 upon the fourth and fifth, and 30 upon the penultimate turn. The intercostal spaces as wide as the ribs, crossed by five series of broad spiral pits, which are not quite as wide as the five raised cords which they bound, and which render the ribs somewhat nodulose at their junction. The periphery and the base of the body whorl are well rounded, the latter marked by six spiral cords and a feeble continuation of the axial ribs. The aperture is oval. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is moderately strong, curved, and reinforced by the base.[1]
Distribution
[edit]The type species was found in the Pacific Ocean off San Hipolito Point, Baja California peninsula.
References
[edit]- ^ a b Dall & Bartsch (1909), A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p.123
- ^ WoRMS (2011). Turbonilla hipolitensis Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576035 on 2012-03-01
- ^ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064