Coelotrochus tiaratus

Coelotrochus tiaratus
Drawing of a live specimen of Coelotrochus tiaratus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea (superfamily)
Family: Trochidae
Genus: Coelotrochus
Species: C. tiaratus
Binomial name
Coelotrochus tiaratus
(Quoy & Gaimard, 1834) [1]
Synonyms
  • Anthora conica Hutton, 1883
  • Chlorostoma (Neozelandia) huttoni Cossmann, 1918
  • Polydonta elegans Gray, 1835
  • Trochus chatamensis Hutton, 1893
  • Trochus delicatulus Philippi, 1846
  • Trochus tiaratus Quoy & Gaimard, 1834

Coelotrochus tiaratus, common name the tiara top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[2]

Description

The shell grows to a length of 18 mm. The depressed conical shell is very deeply false-umbilicate and rather thin. The spire has convex outlines;. The apex is acute, and lemon yellow when eroded. The 5 to 5½ whorls are nearly planulate, but the upper margin of each whorl is prominent and projecting beyond the periphery of the preceding. The body whorl is carinated at the periphery. The sculpture above consists of spiral lirae, about 5 to 8 on each whorl, cut into close oblique beads. The interstices are obliquely finely striate, one or two of the broader ones usually with a central riblet. The color of the shell is whitish or yellowish, finely tessellated or articulated with reddish brown The tessellations are formed by the disintegration of narrow radiating stripes, which are on the base frequently continuous. The base of the shell is nearly flat, with seven or eight concentric close fine lines, which are crenulated in a peculiarly irregular manner by distinct short oblique impressed marks. The interstices are finely radiately striate. The subrhomboidal aperture is smooth within. The columella is oblique, nearly straight, with an obsolete, scarcely perceptible fold above, inserted upon the side of the umbilicus, not in its center. The smooth umbilical area is white or yellow. The false-umbilicus is deep and narrow, but partly filled by a white callus, not tapering to a point.[3]

Distribution

This marine shell occurs off New Zealand.

References

  1. Quoy et Gaimard, Voyage de V Astrolabe, iii, p. 256, t. 64, f 6-11, 1832
  2. Rosenberg, G. (2012). Coelotrochus tiaratus (Quoy & Gaimard, 1834). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=598204 on 2012-11-23
  3. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia

External links

External identifiers for Coelotrochus tiaratus
WoRMS 598204
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