Turbonilla centrota

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Turbonilla centrota
Turbonilla centrota 001.png
Drawing of a shell of Turbonilla centrota
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Turbonilla
Species:
T. centrota
Binomial name
Turbonilla centrota
Dall & Bartsch, 1909
Synonyms
  • Chemnitzia acuminata C. B. Adams, 1853
  • Chrysallida acuminata C. B. Adams, 1863
  • Turbonilla (Turbonilla) centrota Dall & Bartsch, 1909

Turbonilla centrota is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [1] [2]

Contents

Description

The milk-white shell has a very broadly conic shape. The length of the shell is 2.8 mm. It is tabulatedly shouldered. The 2½ whorls of the protoconch form a decidedly elevated spire, the axis of which is at right angles to that of the succeeding turns, in the first of which it is slightly immersed. The seven rounded whorls of the teleoconch have decidedly tabulated summits, and are constricted at the sutures. They are ornamented by strong, narrow, protractive axial ribs. Of these ribs 14 occur upon the first, 16 upon the second and third, 18 upon the fourth and fifth, and 20 upon the penultimate turn. The intercostal spaces are a little more than twice as wide as the ribs, well impressed, and terminate at the periphery. The sutures are very strongly marked. The periphery and the base of the body whorl are well rounded. They are marked by the continuations 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 slender, somewhat curved and slightly revolute. [3]

Distribution

This species occurs in the Pacific Ocean off Panama.

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References

  1. ↑ Rosenberg, G. (2012). Turbonilla centrota Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575984 on 2012-03-01
  2. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064
  3. ↑ Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 19: 1909
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