Turbonilla jewetti

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Turbonilla jewetti
Turbonilla jewetti 001.png
Drawing of a shell of Turbonilla jewetti
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Turbonilla
Species:
T. jewetti
Binomial name
Turbonilla jewetti
Dall & Bartsch, 1909 [1]
Synonyms

Turbonilla (Pyrgiscus) jewetti Dall & Bartsch, 1909

Contents

Turbonilla jewetti is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [2] [3] [4]

Description

The shell is short, and robust. Its length measures 5.5 mm. It is rose pink, but wax yellow at tip. The 2½ whorls of the protoconch are very small, low, and helicoid. Their axis is at right angles to that of the succeeding turns, in the first of which they are about one-third immersed. The eight whorls of the teleoconch are flattened, and shouldered at the summit. They are marked by strong, rounded, slightly protractive axial ribs; of which 18 occur upon the second, 20 upon the third, 22 upon the fourth and fifth, 24 upon the sixth, and 26 upon the penultimate turn. The intercostal spaces are about equal to the ribs, and strongly impressed. They are marked by five series of equal and equally spaced spiral pits, the first of which is at the periphery, the last a little farther from the summit than its neighbor. The sutures are strongly marked, and rendered sinuous by the ribs. The periphery of the body whorl is rounded. It is marked by the feeble continuations of the axial ribs. The base of the shell is moderately long, and well rounded. It is marked by eight unequal and unequally spaced spiral striations, the two immediately below the periphery being stronger than the rest and somewhat interrupted. The aperture is oval. The outer lip is thick within. The columella is stout, somewhat twisted and slightly revolute. [1]

Distribution

The type specimen was found in the Pacific Ocean off San Diego, California.

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References

  1. 1 2 Dall & Bartsch (1909), A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 82
  2. ↑ Rosenberg, G. (2011). Turbonilla jewetti. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576046 on 2012-03-01
  3. ↑ 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.
  4. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064
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