''Aesopus urania'' 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 ...

Columbellidae The Columbellidae, the dove snails or dove shells, are a family of minute to small sea snails, marine gastropod mollusks in the order Neogastropoda.Bouchet, P.; Gofas, S. (2010). Columbellidae. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) Wo ...

, the dove snails.

Description

(Original description in Latin) The shell is thin, fusiform, and narrow, with a shiny brown exterior contrasting with a shining white apex. It has 6-7

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, the apical three being very light and vitreous, while the others are darkly but finely spirally striated and slightly brown. 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 narrow and oblong, with a slightly expanded outer lip. The columella is oblique and truncated towards the base. The species is characterized by its fusiform shell, which is broadly truncate posteriorly, with a linear aperture and a posterior callus (although this feature is not prominent in our specimens). The columella is smooth and vitreous. The color of the shell is typically uniformly chestnut or darker brown, fading into white towards the apex. The variety ''albens'' is completely colorless, possibly representing a bleached specimen. The last two or three whorls are largely vitreous. The aperture is narrow, and the columella is basally truncate and oblique. The outer lip shows a slight effusion. The entire surface of the whorls is closely, but obscurely, spirally striated. Melvill, J. C. & Standen, R. (1901). The Mollusca of the Persian Gulf, Gulf of Oman and Arabian Seas as evidenced mainly through the collections of Mr. F. W. Townsend, 1893-1900, with descriptions of new species. Part 1, Cephalopoda, Gastropoda, Scaphopoda. Proceedings of the Zoological Society of London. 1901 (2): 327-460

Distribution

This marine species occurs in the

Gulf of Oman The Gulf of Oman or Sea of Oman ( ar, خليج عمان ''khalīj ʿumān''; fa, دریای عمان ''daryâ-ye omân''), also known as Gulf of Makran or Sea of Makran ( ar, خلیج مکران ''khalīj makrān''; fa, دریای مکرا� ...

off

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

References

{{Taxonbar, from=Q13231413

urania Urania ( ; grc, , Ouranía; modern Greek shortened name ''Ránia''; meaning "heavenly" or "of heaven") was, in Greek mythology, the muse of astronomy, and in later times, of Christian poetry. Urania is the goddess of astronomy and stars, he ...

Gastropods described in 1901