''Bankivia fasciata'', common name the banded kelp shell, is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

, a marine

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Trochidae The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles ...

, the top snails.Bouchet, P. (2012). ''Bankivia fasciata'' (Menke, 1830). Accessed through:

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

at http://www.marinespecies.org/aphia.php?p=taxdetails&id=564813 on 2012-11-23

Description

The length of the shell varies between 15 mm and 25 mm. The thin, imperforate, elongated shell has a turreted shape. This is a variable species in size and coloration. It is polished and shining, white, creamy or pink, with spiral bands of pink, purplish-red or purplish-brown, or narrow oblique zigzag stripes of pinkish-brown, usually with a narrow subsutural fascia of dark or pinkish. The

spire A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spire ...

is elevated and slender. The dark

apex The apex is the highest point of something. The word may also refer to: Arts and media Fictional entities * Apex (comics) A-Bomb Abomination Absorbing Man Abraxas Abyss Abyss is the name of two characters appearing in Ameri ...

is a little blunt. The about 9

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). In nature File:Photograph and axial plane floral diagra ...

s are, very slightly convex, and a trifle impressed below the sutures. The surface (under a lens) is very densely, finely spirally striate. The

body whorl The body whorl is part of the morphology (biology), morphology of the gastropod shell, 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 ...

is rounded. The base of the shell shows a few concentric, separated, impressed lines. The

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

is ovate. The thin outer

lip The lips are a horizontal pair of soft appendages attached to the jaws and are the most visible part of the mouth of many animals, including humans. Mammal lips are soft, movable and serve to facilitate the ingestion of food (e.g. sucklin ...

is acute. The sinuous

columella Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire. His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...

is arcuate above and narrowly reflexed, obliquely truncate below.H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
(described as ''Cantharidus fasciatus'')

Distribution

This marine species occurs in the

Gulf of Aqaba The Gulf of Aqaba () or Gulf of Eilat () is a large gulf at the northern tip of the Red Sea, east of the Sinai Peninsula and west of the Arabian Peninsula. Its coastline is divided among four countries: Egypt, Israel, Jordan, and Saudi Arabia. ...

, off

Mozambique Mozambique, officially the Republic of Mozambique, is a country located in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini and South Afr ...

and off

New South Wales New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...

South Australia South Australia (commonly abbreviated as SA) is a States and territories of Australia, state in the southern central part of Australia. With a total land area of , it is the fourth-largest of Australia's states and territories by area, which in ...

, and off

Tasmania Tasmania (; palawa kani: ''Lutruwita'') is an island States and territories of Australia, state of Australia. It is located to the south of the Mainland Australia, Australian mainland, and is separated from it by the Bass Strait. The sta ...

References

* Pritchard, G.B. & Gatliff, J.H., 1902. ''Catalogue of the Marine Shells of Victoria. Part V''. Proc. R. Soc. Vict.n.s., 14(2):85-138 * Shirley, J., 1911. ''Additions to the Marine Mollusca of Queensland''. Proc. R. Soc. Qld, XXIII(1):96-96 * Cotton, B.C. (1959). ''South Australian Mollusca. Archaeogastropoda''. Adelaide : Govt. Printer. * Iredale, T. & McMichael, D.F., 1962 1/Dec/1962 ''A reference list of the marine Mollusca of New South Wales''. Mem. Aust. Mus., 11:0-0 * Macpherson, J.H. & Gabriel, C.J., 1962. ''Marine Mollusca of Victoria''. Melbourne Univ. Press, Melbourne. 475 * Barash, A., Danin, Z. & Yaron, I. (1980). ''Bankivia fasciata (Menke, 1830) in the Gulf of Aquaba'' . Bolletino Malacologico. 16 (1-2) * Wilson, B., 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Odyssey Publishing, Kallaroo, WA

External links

Biodiversity Heritage Library (11 publications)

Encyclopedia of Life

USNM Invertebrate Zoology Mollusca Collection

USNM Invertebrate Zoology Mollusca Collection

World Register of Marine Species
* {{Taxonbar, from=Q4856366 fasciata Gastropods described in 1830