''Adelopoma occidentale'' 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 ...

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

with an operculum, a terrestrial

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 Diplommatinidae. MolluscaBase eds. (2024). MolluscaBase. Adelopoma occidentale (Godwin-Austen, 1886). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1434768 on 2024-04-13

Description

(Original description) The sinistral shell is elongately turreted and scarcely sinuate. Its

sculpture Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable sc ...

has a somewhat distant well marked costulation The colour is white. 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 rather attenuate and had a blunt apex. The suture is deep. The shell contains 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 with tumid sides. 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 small, the penultimate whorl much the broadest, those above becoming gradually swollen to the apex. 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 small, subvertical and round. The peristome is continuous, closely double. The columellar margin is weak, no tooth, the twist on columella seen within the aperture. Godwin-Austen, H. H. (1882-1920). Land and freshwater Mollusca of India, including South Arabia, Baluchistan, Afghanistan, Kashmir, Nepal, Burmah, Pegu, Tenasserim, Malay Peninsula, Ceylon, and other islands of the Indian Ocean. Supplementary to Messrs. Theobald and Hanley's Conchologia Indica. London, Taylor & Francis.
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Distribution

This species is found in

Trinidad and Tobago Trinidad and Tobago (, ), officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean. Consisting of the main islands Trinidad and Tobago, and numerous much smaller islands, it is situated south of ...

and

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

References

* Robinson, D. G., Fields, A. & Zimmerman, F. J. (2004). The terrestrial malacofauna of Trinidad and Tobago. Interim report. 1-21.

External links

Bartsch, P. (1942). The cyclophorid mollusks of the West Indies, exclusive of Cuba. In: de la Torre, C.; Bartsch, P.; Morrison, J. P. E. The cyclophorid operculate land mollusks of America. United States National Museum Bulletin. 181(2): 43-141

Kobelt W. (1902). Das Tierreich. Eine Zusammenstellung und Kennzeichnung der rezenten Tierformen. 16. Lieferung. Mollusca. Cyclophoridae. Das Tierreich. XXXIX + 662 pp., 1 map.
{{Taxonbar, from=Q106096300 Diplommatinidae Gastropods described in 1890