Turbonilla halistrepta

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

Turbonilla (Pyrgolampros) halistrepta Dall & Bartsch, 1909

Contents

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

Description

The shell has an elongate-conic shape. Its length measures 9.5 mm. Its color is wax yellow with a broad subsutural, narrow submedian and a broad subperipheral band of golden brown. These color markings make this species different from Turbonilla lituyana and Turbonilla oregonensis . (The whorls of the protoconch are decollated). The whorls of the teleoconch are situated rather high between the sutures. They are very slightly shouldered. They are marked by almost obsolete, nearly vertical axial ribs, which are best, but still poorly developed near the summit and practically disappear before they reach the suture on the early whorls. On the last three they are scarcely indicated. Of these ribs there are about 28 upon the third and 24 upon the seventh whorl. The sutures are well impressed. The periphery and the short base of the body whorl are somewhat inflated, and well rounded. The entire surface of the spire and the base are marked by many well incised, closely spaced, wavy, spiral striations. Some of the fine lirations between the incised lines are a little darker colored than the rest of the surface and appear as reddish-brown hair lines. The aperture is oval. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is slender, strongly curved and moderately revolute. [1]

Distribution

The type species was found in the Pacific Ocean off Newport, 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.72-73
  2. ↑ Rosenberg, G. (2011). Turbonilla halistrepta Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581336 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.
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