Gibbula magus

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Gibbula magus
Gibbula magus 01.JPG
Gibbula magus
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Genus: Gibbula
Species:
G. magus
Binomial name
Gibbula magus
(Linnaeus, 1758)
Synonyms
  • Gibbula belliniiCoen 1930
  • Gibbula forskadauriNordsieck 1982
  • Gibbula magus var. turbinosaMonterosato 1890
  • Gibbula protumidaLocard 1886
  • Gibbula vulcanicaCoen 1930
  • Trochus bicarinatusGray J.E. 1834
  • Trochus grayanusPhilippi 1846
  • Trochus magusLinnaeus, 1758 (original combination)
  • Trochus magus var. albaJeffreys 1865
  • Trochus magus var. dilatataChiamenti 1900
  • Trochus magus var. elataDanilo & Sandri 1856
  • Trochus magus var. obsoletaBucquoy, Dautzenberg & Dollfus 1884
  • Trochus magus var. productaBucquoy, Dautzenberg & Dollfus 1884
  • Trochus tuberculatusda Costa, 1778

Gibbula magus, common name the great top shell, is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails. [1]

Contents

Description

The size of the shell varies between 17 mm and 35 mm. This is an abundant species. The solid, widely, deeply umbilicate shell has a low-conical shape. There is great variation in color. It is whitish or yellowish, painted with zigzag radiating stripes, maculations or lines of pink or rich brown, sometimes so broken into minute flecks as to appear minutely mottled all over, or sometimes lacking markings. The base of the shell is radiately zigzag-striped. The apex is acute. The conical spire contains 7 to 8 whorl. These are swollen, gibbous and radiately plicate beneath the sutures, and with a rim or flange at the periphery. The entire surface is spirally finely striate. The base is convex. The aperture is very oblique, rounded-rhomboid, and smooth within. The columella oblique, its edge straight or slightly convex in the middle, at its insertion reflexed slightly over the umbilicus. The umbilicus is bounded by a strong spiral rib. [2]

Distribution

This species occurs in the North Sea, the North Atlantic Ocean (Azores, Morocco) and in the Mediterranean Sea.

References

  1. Gofas, S. (2013). Gibbula magus (Linnaeus, 1758). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141790 on 2014-01-28
  2. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia