Odostomia avellana

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Odostomia avellana
Odostomia avellana 001.png
Apertural view of a shell of Odostomia avellana
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Odostomia
Species:
O. avellana
Binomial name
Odostomia avellana
Carpenter, 1864 [1]
Synonyms [2]
  • Aartsenia avellana (Carpenter, 1864)
  • Odostomia (Amaura) avellana Carpenter, 1864

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

Contents

Description

The large, elongate-ovate shell is yellowish to milk white. Its length measures 8.3 mm. The whorls of the protoconch are deeply vertically immersed. Only a part of the last volution is visible when viewed from above, their axis evidently being at a right angle to the axis of the later whorls. The five whorls of the teleoconch are increasing rapidly in size, early ones well rounded, later ones less so, their summits being closely appressed to the preceding whorl. The simple sutures are well impressed. The periphery and the base of the body whorl are well rounded, the latter somewhat elongated. The aperture islarge, ovate, somewhat effuse anteriorly, milk-white within. The posterior angle is acute. The outer lip is thin at the edge, thick within. The short columella is curved and reinforced partly by the attenuated base, having a strong oblique fold at its insertion. The parietal wall is covered by a moderately strong callus. [5]

Distribution

This species occurs in the Pacific Ocean off Vancouver Island.

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References

  1. ↑ Carpenter, Ann. Mag. Nat. Hint., 3d wr., vol. 15, 1865,
  2. ↑ Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 245; 1909 Plate 28 # 3
  3. ↑ Rosenberg, G. (2011). Odostomia avellana Carpenter, 1864. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581103 on 2011-10-26
  4. ↑ 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.
  5. ↑ William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909
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