Turbonilla clarinda

Turbonilla clarinda
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia; clade Euthyneura; clade Panpulmonata
Superfamily:	Pyramidelloidea
Family:	Pyramidellidae
Subfamily:	Turbonillinae
Genus:	Turbonilla
Species:	T. clarinda
Binomial name
	Turbonilla clarinda; Bartsch, 1912 [1]
Synonyms
	Turbonilla (Chemnitzia) clarinda Bartsch, 1912

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

Description

The bluish-white shell is semi translucent and has an elongate-conic shape. Its length is 4.7 mm. The 2½ whorls of the protoconch form a rather solute, elevated, helicoid spire. Its axis is at right angles to the succeeding turns, in the first of which it is slightly immersed. The ten whorls of the teleoconch are well rounded and appressed at the summit. They are marked by very regular, rounded, slightly protractive axial ribs, of which 16 occurs on the first to seventh, 18 upon the eight and the penultimate turn. These ribs become slightly flattened and somewhat expanded at the summit. The intercostal spaces are a little wider than the ribs and well impressed. They terminate a little posterior to the suture thus leaving a plain, narrow band immediately above the suture. The sutures are somewhat constricted. The periphery and the base of the body whorl are well rounded and smooth. The aperture is subquadrate. The posterior angle is obtuse. The outer lip is thin, showing the external sculpture within. The slender inner lip is slightlyt sinuous and very slightly revolute.[1]

Distribution

This species occurs in the Pacific Ocean off San Diego Bay, California.

References

P. Bartsch (1912), Additions to the West Ameridan pyramidellid fauna, with descriptions of new species; Proceedings of the United States National Museum 42:261-289 (1912)
Rosenberg, G. (2011). Turbonilla clarinda Bartsch, 1912. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581315 on 2012-03-01
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.

External links

To World Register of Marine Species

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[Bartsch-1] P. Bartsch (1912), Additions to the West Ameridan pyramidellid fauna, with descriptions of new species; Proceedings of the United States National Museum 42:261-289 (1912)

[WoRMS-2] Rosenberg, G. (2011). Turbonilla clarinda Bartsch, 1912. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581315 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.