Ethalia guamensis

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Ethalia guamensis
Drawing of a shell of Ethalia guamensis
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea
Family: Trochidae
Genus: Ethalia
Species: E. guamensis
Binomial name
Ethalia guamensis
(Quoy & Gaimard, 1834) [1]
Synonyms[2]
  • Ethalia guamensis selenomphala Pilsbry, H.A., 1905
  • Rotella guamensis Quoy & Gaimard, 1834
  • Rotella montrouzieri Souverbie, 1860
  • Umbonium (Ethalia) guamense A. Adams, 1853

Ethalia guamensis, common name the Guam button top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[2][3][4]

The subspecies Ethalia guamensis montrouzieri (Souverbie, 1858)is a synonym of Rotella montrouzieri Souverbie, 1858

Description

The length of the shell varies between 10 mm and 25 mm. The depressed, polished shell is perforate, solid, strong, and smooth. Its color is whitish, mottled and lineolate above with brown, reddish, fawn-color or purplish, with 4 narrow spiral articulated lines, sometimes scarcely visible because of the variegated coloration. The color of the base is lighter. There are six whorls, convex, the last one rounded and convex beneath. The suture is impressed. The aperture is oblique. The outer wall is moderately thick. The columella is strong and thick, arcuate above, spread upon the body whorl and nearly over the umbilicus in a pad of callus, which is either white, pink or deep crimson. The callus is kidney-shaped, but slightly convex, filling the umbilicus except a narrow chink. From the outer termination of the callus an arcuate groove extends to the base of the columella, within which the surface of the shell is radiately finely striate and darker colored.[5]

Distribution

This marine species occurs off Southeast Asia, Guam, the Philippines, Japan and Australia.

References

  1. ↑ Quoy & Gaimard, Voy. de I'Astrolabe, Zool. iii, p. 267, t. 61, f. 32, 33, 1834
  2. ↑ 2.0 2.1 Bouchet, P. (2012). Ethalia guamensis (Quoy & Gaimard, 1834). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=547307 on 2012-11-23
  3. ↑ Poppe G.T., Tagaro S.P. & Dekker H. (2006) The Seguenziidae, Chilodontidae, Trochidae, Calliostomatidae and Solariellidae of the Philippine Islands. Visaya Supplement 2: 1-228.
  4. ↑ Herbert D.G. (1996) A critical review of the trochoidean types in the Muséumd'Histoire naturelle, Bordeaux (Mollusca, Gastropoda). Bulletin du Muséum national d'Histoire naturelle, Paris, ser. 4, 18 (A, 3-4): 409-445.
  5. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia

External links

External identifiers for Ethalia guamensis
Encyclopedia of Life 4796447
NCBI 529739
WoRMS 547307
Wikimedia Commons has media related to Ethalia guamensis.


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