''Tegula quadricostata'' is a
species of
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:
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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 Tegulidae
Tegulidae is a family of small to large sea snails, marine gastropod mollusks in the superfamily Trochoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P. (2013). Tegulidae Kuroda, Habe & Oyama, 1971. Access ...
.
[Bouchet, P. (2013). Tegula quadricostata (W. Wood, 1828). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=718896 on 2013-12-30]
Description
The size of the shell varies between 15 mm and 30 mm. The thick, solid, umbilicate shell has a conical shape and has a blackish color. The
spire is conoidal. The
apex is rather blunt. The
sutures are canaliculate. The six
whorl
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 encircled by four coarsely tuberculose ribs on the upper surface ; the upper two contiguous, sometimes coalescent. The base of the shell shows 3 or 4 separated smaller beaded ribs, the broad interstices both above and below densely, finely spirally striate. The periphery is obtusely angular. The base is nearly flat. The oblique
aperture is smooth within. The oblique
columella is sinuous and bidentate. The
umbilicus is surrounded by a white callus, bearing inside a strong spiral rib which terminates in a denticle about the middle of the columella.
Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
(described as ''Chlorostoma quadricostatum'')
Distribution
This species occurs in the Pacific Ocean between Peru and Chile.
References
External links
World Register of Marine Species
*
{{Taxonbar, from=Q14465879
quadricostata
Gastropods described in 1828