Phorcus lineatus

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Phorcus lineatus
Phorcus lineatus 01.JPG
A shell of Phorcus lineatus
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: Phorcus
Species:
P. lineatus
Binomial name
Phorcus lineatus
(da Costa, 1778)
Synonyms [1]
  • Monodonta crassaMontagu, 1803
  • Monodonta lineatada Costa, 1778
  • Monodonta lugubrisLamarck 1822
  • Osilinus lineatus(da Costa, 1778)
  • Trochocochlea denudataMonterosato, 1888
  • Trochus crassus(Pulteney, 1799)
  • Trochus lineatusda Costa, 1778 (original description)

Phorcus lineatus, common name the lined top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. [1] [2] It is native to shores of the eastern North Atlantic Ocean.

Contents

Description

The size of the shell varies between 10 mm and 35 mm. The very thick and solid imperforate shell is subperforate in the young. It has a globose-conic shape. It is dull grayish, densely marked all over with very numerous fine flexuous or zigzag braided purplish-black lines. The spire is conic. The 6 to 7 whorls are convex. The apex is usually eroded and orange-colored. The body whorl is flattened around the superior portion. The base of the shell is eroded in front of the aperture. The aperture is oblique. The columella is short, obtusely subdentate near the base, spreading at the insertion into a heavy callous, which covers the umbilicus.

This species is similar to Phorcus turbinatus in form, but usually has the outlines of the spire more convex. The columella projection or tooth is nearer the base than in the Phorcus turbinatus, and the diverse color patterns will serve to further distinguish the two species. [3]

Two Phorcus lineatus in the centre of the photo Patella lusitanica-Mytilus edulis-Monodonta lineata-Balanus balanoides.jpg
Two Phorcus lineatus in the centre of the photo

Distribution

This species occurs in the following locations: [1]

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References

  1. 1 2 3 Gofas, S. (2012). Phorcus lineatus (da Costa, 1778). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=689176 on 2012-11-23
  2. ↑ Donald K.M., Preston J., Williams S.T., Reid D.R., Winter D., Alvarez R., Buge B., Hawkins S.J., Templado J. & Spencer H.G. 2012. Phylogenetic relationships elucidate colonization patterns in the intertidal grazers Osilinus Philippi, 1847 and Phorcus Risso, 1826 (Gastropoda: Trochidae) in the northeastern Atlantic Ocean and Mediterranean Sea. Molecular Phylogenetics and Evolution, 62(1): 35–45
  3. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia (described as Monodonta crassa)


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