Odostomia nunivakensis
| Odostomia nunivakensis | |
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| Apertural view of a shell of Odostomia nunivakensis | |
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| Species: | O. nunivakensis
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| Binomial name | |
| Odostomia nunivakensis Dall & Bartsch, 1909
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Evalea nunivakensis (Dall & Bartsch, 1909) | |
Odostomia nunivakensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1] [2]
Description
The milk-white shell is elongate ovate and deeply umbilicated. The whorls of the protoconch are small, deeply obliquely immersed in the first of the succeeding turns. The five whorls of the teleoconch are increasing very regularly in size, rather high between the sutures, well rounded with strongly tabulated summits. The sutures are strongly marked. The periphery and the base of the body whorl are well rounded. The spiral sculpture consisting of incised lines only. The umbilicus is bounded by a slender thread. The aperture is elongate-ovate. The posterior angle is obtuse. The outer lip is thin. The columella is slender, ε-shaped, slightly revolute, free from the base, armed with a strong fold near its center. The entire surface is crossed by fine lines of growth and exceedingly fine, closely spaced, wavy spiral striations. (The spiral striations have been omitted in the drawing). [3]
Distribution
The type specimen was found off Nunivak Island, Alaska
References
- ^ Rosenberg, G. (2011). Odostomia nunivakensis Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581235 on 2011-11-10
- ^ Turgeon, D.; Quinn, J.F.; Bogan, A.E.; Coan, E.V.; Hochberg, F.G.; Lyons, W.G.; Mikkelsen, P.M.; Neves, R.J.; Roper, C.F.E.; Rosenberg, G.; Roth, B.; Scheltema, A.; Thompson, F.G.; Vecchione, M.; Williams, J.D. (1998). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. 2nd ed. American Fisheries Society Special Publication, 26. American Fisheries Society: Bethesda, MD (USA). ISBN 1-888569-01-8. IX, 526 + cd-rom pp.
- ^ A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, 1909 Plate 22 # 6