Steromphala divaricata

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Steromphala divaricata
Gibbula divaricata 01.JPG
Shell of Steromphala divaricata
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Subfamily: Cantharidinae
Genus: Steromphala
Species:
S. divaricata
Binomial name
Steromphala divaricata
(Linnaeus, 1758)
Synonyms
  • Gibbula divaricata(Linnaeus, 1758)
  • Gibbula divaricata var. diversaMonterosato 1888
  • Gibbula divaricata var. regularisMonterosato 1889
  • Gibbula divaricata var. scalarisCoen 1937
  • Gibbula specialisCoen 1937
  • Mondonta lessoniPayraudeau, 1826
  • Steromphala divaricata(Linnaeus, 1758)
  • Trochus barbieriiBrusina 1866
  • Trochus daniliBrusina 1866
  • Trochus divaricatusLinnaeus, 1758 (basionym)
  • Trochus lineolatusO. G. Costa, 1830 (invalid: junior homonym of Trochus lineolatusRisso, 1826)
  • Trochus marginatusBrusina 1866
  • Trochus variansO. G. Costa, 1830

Steromphala divaricata, common name the divaricate gibbula, is a species of small sea snail, known as top snails or top shells, marine gastropod molluscs in the family Trochidae, the top snails. [1]

Contents

Distribution

It is found in the Mediterranean Sea, the Adriatic Sea and the Black Sea.

Description

The length of the shell is between 12 mm and 24 mm and is 16 mm to 19 mm wide. The conoidal shell is imperforate or narrowly perforate. It is very thick and solid, cinereous. The color of the shell is yellowish or green. It is longitudinally marked with rose-red lines, often oblique or broken into square dots. The spire is more or less elevated. Its outlines are rather convex. The six whorls are encircled by numerous lirulae, the upper ones flattened. The sutures are slightly impressed, but scalariform specimens with deep sutures are frequent. The body whorl is rounded at the periphery and on the base. The aperture is rounded-quadrate. The outer lip is bevelled to an edge, very thick and smooth within. The pearly columella is straightened in the middle. The umbilicus is narrow or concealed. [2]

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References

  1. ↑ MolluscaBase eds. (2020). MolluscaBase. Steromphala divaricata (Linnaeus, 1758). Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=576618 on 2020-12-30
  2. ↑ G.W. Tryon (1889), Manual of Conchology XI p. 207-208
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