Cookia sulcata

Cookia sulcata
shell of Cookia sulcata
umbilical view of a shell of Cookia sulcata
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Vetigastropoda
Superfamily:	Trochoidea (superfamily)
Family:	Turbinidae
Genus:	Cookia
Species:	C. sulcata
Binomial name
Cookia sulcata (Gmelin, 1791)
Synonyms[1]
Astraea cookii (Gmelin, 1791) Astraea sulcata (Martyn, 1784) Astralium (Cookia) sulcatum Martyn, 1784 Bolma (Cookia) sulcata (Gmelin, 1791) Cookia nobilis Lesson Cookia novaezelandiae Lesson, 1832 Trochus cookii Gmelin, 1791 Trochus sulcatus Gmelin, 1791 Trochus sulcatus Martyn, 1784 (rejected name)

Cookia sulcata, or Cook's turban, is a species of large sea snail, a marine gastropod mollusc in the family Turbinidae, the turban snails.^[1]

The operculum of Cookia sulcata

Description

The length of the shell varies between 50 mm and 90 mm. The large, imperforate, rather thin shell is conic. The periphery is rounded. The spire is more or less elevated. The sutures are deeply impressed. The seven whorls are well rounded, with close lamellose incremental striae, and corrugated by obliquely descending subtuberculose folds. The base is flattened bearing concentric densely squamose lirae, deeply concave in the center, and indented in the place of the umbilicus. The aperture is transversely oval, very oblique, pearly and somewhat corrugated within. The thin columella is arcuate. The umbilical region and part of base is covered with a thin callus. The operculum is brownish or white inside.

The median tooth of the radula has a long basal plate and a short body. It bears no cusp, and has small supporting wings. The first lateral also is much like that in Pomaulax. The others bear cusps. The inner marginal is very broad, with wide cusp. The cusps of outer marginals are simple.^[2]

Distribution

This marine species occurs off New Zealand.

References

1. Bouchet, P. (2012). Cookia sulcata (Lightfoot, 1786). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=413403 on 2012-03-15
2. G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia (described as Astralium (Cookia) sulcatum)

Further reading

• Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Glen Pownall, New Zealand Shells and Shellfish, Seven Seas Publishing Pty Ltd, Wellington, New Zealand 1979 ISBN 0-85467-054-8
• Spencer, H.; Marshall. B. (2009). All Mollusca except Opisthobranchia. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp
• Alf A. & Kreipl K. (2011) The family Turbinidae. Subfamilies Turbininae Rafinesque, 1815 and Prisogasterinae Hickman & McLean, 1990. In: G.T. Poppe & K. Groh (eds), A Conchological Iconography. Hackenheim: Conchbooks. pp. 1–82, pls 104-245.

External links

• Gastropods.com: Cookia sulcata