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''Phorcus lineatus'', common name the lined top shell, is a species of
Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
(described as ''Monodonta crassa'')
To World Register of Marine Species
* {{Taxonbar, from=Q7187373 lineatus Gastropods described in 1778 Gastropods of Africa Gastropods of Europe Taxa named by Emanuel Mendes da Costa
sea snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...
, a marine
Marine is an adjective meaning of or pertaining to the sea or ocean.
Marine or marines may refer to:
Ocean
* Maritime (disambiguation)
* Marine art
* Marine biology
* Marine debris
* Marine habitats
* Marine life
* Marine pollution
Military
* ...
gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...
mollusk in the family Trochidae, the top snails.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 It is native to shores of the eastern North Atlantic Ocean.
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 7whorl
A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs).
Whorls in nature
File:Photograph and axial plane floral ...
s are convex. The apex is usually eroded and orange-colored. The body whorl
The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk.
In gastropods
In gastropods, the b ...
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
''Phorcus turbinatus'', common name the turbinate monodont, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Gofas, S. (2012). ''Phorcus turbinatus'' (Born, 1780). Accessed through: World Register of ...
'' 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.(described as ''Monodonta crassa'')
Distribution
This species occurs in the following locations: * European waters ( ERMS scope) * Portuguese Exclusive Economic Zone * Spanish Exclusive Economic Zone * United Kingdom Exclusive Economic Zone * Wimereux * Atlantic Ocean offMauritania
Mauritania (; ar, موريتانيا, ', french: Mauritanie; Berber: ''Agawej'' or ''Cengit''; Pulaar: ''Moritani''; Wolof: ''Gànnaar''; Soninke:), officially the Islamic Republic of Mauritania ( ar, الجمهورية الإسلامية ...
.
References
External links
To World Register of Marine Species
* {{Taxonbar, from=Q7187373 lineatus Gastropods described in 1778 Gastropods of Africa Gastropods of Europe Taxa named by Emanuel Mendes da Costa