''Citharomangelia townsendi'' 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

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 Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Mangeliidae Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea. Bouchet, P. (2011). Mangeliidae P. Fischer, 1883. In: MolluscaBase (2016). Accessed through: World Regis ...

.WoRMS (2009). Citharomangelia townsendi (G. B. Sowerby III, 1895). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433221 on 2017-04-10

Description

The length of the shell varies attains 13 mm, its diameter 3.8 mm. (Original description) The elongate-fusiform shell approaches in form the European ''

Mangelia attenuata ''Mangelia attenuata'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. Description The shell size varies between 5 mm and 13 mm. The shell has nine whorls. Each whorl contains nine ribs, narrow, flexu ...

'' (Montagu, 1803), but it is larger, the elongate

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. Spires are ...

proportionately longer, whilst the

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 slightly shouldered. The transverse striae are very fine, and the longitudinal ribs regular and rounded. The colour is yellowish white, suffused with greyish green, with transverse lines of light brown, and a dark brown band, interrupted by the ribs, at the angle of the whorls, and another near the base of the body-whorl. The

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An opt ...

is oblong and very narrow. The outer lip is acute and incrassate.Sowerby G.B. III, 1895. ''New species of shells from Karachi and the Mekran coast, collected by Mr F. W. Townsend''. . 1: 278–280, pI. 18
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Distribution

This marine species occurs off

Pakistan Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's List of countries and dependencies by population, fifth-most populous country, with a population of almost 24 ...

and West India.

References

External links

Kilburn R.N. 1992. Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 6. Subfamily Mangeliinae, section 1. Annals of the Natal Museum, 33: 461–575

Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1–1295.
* {{DEFAULTSORT:Citharomangelia Townsendi townsendi Gastropods described in 1895