''Turbo crassus'', common name the crass turban, 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:
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 Turbinidae, the turban snails.
[WoRMS (2012). ''Turbo crassus'' W. Wood, 1828. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=534211 on 2012-09-01]
Description
The size of the shell varies between 50 mm and 80 mm. The large, heavy, solid, imperforate shell has an ovate-conic shape. Its color pattern is dirty white, or greenish, maculated with angular, alternating blackish or brown and light patches on the broad flat spiral ribs. The interstices are narrow, superficial, and whitish. 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, convex, more or less prominently shouldered above. The ribs are obsolete around the axis. The
aperture is white within and measures over half the length of shell. It is ovate, angled posteriorly and at position of the carina. Its margin is more or less green tinged, not fluted. The
columella is thickened and effuse at its base, callous posteriorly.
The
operculum is subcircular, concave internally, with a nucleus one-third the distance across face. Its outer surface is very convex, the center dark-brown, coarsely granulose, lighter toward the outer margin and more minutely granulate. The margin of increment is white.
G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
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Distribution
This marine species occurs in the Western Pacific and Polynesia; off Australia ( Queensland).
Notes
Additional information regarding this species:
References
* Wood, W. 1828. ''Index Testaceologicus; or A Catalogue of Shells, British and Foreign, arranged according to the Linnean system.'' London : Taylor Supplement, 1-59, pls 1-8
* Ladd, H.S. 1966. ''Chitons and gastropods (Haliotidae through Adeorbidae) from the western Pacific Islands.'' United States Geological Survey Professional Papers 531: 1-98 16 pls
* Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods.'' Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp.
* Alf A. & Kreipl K. (2003). ''A Conchological Iconography: The Family Turbinidae, Subfamily Turbininae, Genus Turbo''. Conchbooks, Hackenheim Germany.
External links
Encyclopedia of Life
USNM Invertebrate Zoology Mollusca Collection
World Register of Marine Species
*
{{Taxonbar, from=Q7853837
crassus
Marcus Licinius Crassus (; 115 – 53 BC) was a Roman general and statesman who played a key role in the transformation of the Roman Republic into the Roman Empire. He is often called "the richest man in Rome." Wallechinsky, David & Wallace, I ...
Gastropods described in 1828