''Pareuthria fuscata'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

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 ...

Cominellidae The Cominellidae are taxonomic family of large sea snails in the superfamily Buccinoidea.MolluscaBase eds. (2021). MolluscaBase. Cominellidae Gray, 1857. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.ph ...

Description

The size of the shell varies between 25 mm and 45 mm. The ovate, conical shell is smooth and reddish brown. 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. Spires are ...

is composed of six whorls, whose length slightly exceeds that of 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 ...

. The whorls of the spire are convex, bent obliquely at the suture, and marked in that part by slightly projecting and distant longitudinal folds. 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 partially free of these, and those perceptible there, are only slightly obvious on the upper half of the side of the aperture. The aperture is ovate and smooth. The lips are a whitish, clear fawn-color, but the depth of the cavity presents the same tint as the exterior. It is narrower towards the base, where it terminates by a shallow emargination, the edges of which are slightly curved towards the back. The outer lip is simple, sharp upon the edge and effuse. It has, towards its upper part, an oblique fold, which seems to widen the aperture and partially forms the obtuse angle. The columella is almost straight, shining, and of a livid color.Kiener (1840). General species and iconography of recent shells : comprising the Massena Museum, the collection of Lamarck, the collection of the Museum of Natural History, and the recent discoveries of travellers; Boston :W.D. Ticknor,1837
(described as ''Buccinum fuscatum'' )

Distribution

This marine species occurs off the

Falklands The Falkland Islands (; es, Islas Malvinas, link=no ) is an archipelago in the South Atlantic Ocean on the Patagonian Shelf. The principal islands are about east of South America's southern Patagonian coast and about from Cape Dubouzet ...

; in the

Strait of Magellan The Strait of Magellan (), also called the Straits of Magellan, is a navigable sea route in southern Chile separating mainland South America to the north and Tierra del Fuego to the south. The strait is considered the most important natural pass ...

; in Antarctic waters.

References

External links

*
Bruguière J.G. (1789-1792). Encyclopédie méthodique ou par ordre de matières. Histoire naturelle des vers, volume 1. Paris: Pancoucke. Pp. i-xviii, 1-34

hilippi, R. A. (1842-1850). Abbildungen und Beschreibungen neuer oder wenig gekannter Conchylien unter Mithülfe meherer deutscher Conchyliologen. Cassel, T. Fischer

Crosse H. (1861). Description d'espèces nouvelles. Journal de Conchyliologie. 9(2): 171-176

Reeve, L. A. (1846-1847). Monograph of the genus Buccinum. In: Conchologia Iconica, or, illustrations of the shells of molluscous animals, vol. 3, pl. 1-14 and unpaginated text. L. Reeve & Co., London.

Philippi, (R.) A. (1845). Diagnosen einiger neuen Conchylien. Archiv für Naturgeschichte. 11: 50-71.

Filhol H. (1880). Mollusques marins vivant sur les côtes de l'ile Campbell. Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences. 91: 1094–1095

Pastorino G. (2016). Revision of the genera Pareuthria Strebel, 1905, Glypteuthria Strebel, 1905 and Meteuthria Thiele, 1912 (Gastropoda: Buccinulidae) with the description of three new genera and two new species from Southwestern Atlantic waters. Zootaxa. 4179(3): 301-344

Di Luca, J. & Zelaya, D. G. (2019). Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity. Zootaxa. 4544(1): 41-78
Cominellidae Gastropods described in 1789 Taxa named by Jean Guillaume Bruguière {{Buccinidae-stub