''Aesopus algoensis'' 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 ...

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

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 ...

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

, the dove snails.

Description

The length of an adult shell attains 8 mm, its diameter 2¾ mm. (original description in Latin) The shell is elongate and turreted. It shows a yellow base color adorned sporadically with light brown transverse interstices and brown zoning towards the anterior. 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 pronounced, ending in a papillary

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 ...

, with distinct sutures. It consists of five slightly convex

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, irregularly folded longitudinally and densely sulcate spirally. 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 narrow. The

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 slightly recurved, and 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 small with a 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 ...

.Sowerby, G. B. III. (1892). Marine shells of South Africa. A catalogue of all the known species with references to figures in various works, descriptions of new species, and figures of such as are new, little known, or hitherto unfigured, London: G. B. Sowerby. 89 pp., 5 pls

Distribution

This marine species occurs off

Algoa Bay Algoa Bay is a maritime bay in the Eastern Cape, South Africa. It is located on the east coast, east of the Cape of Good Hope. Algoa Bay is bounded in the west by Cape Recife and in the east by Cape Padrone. The bay is up to deep. The harbour ...

, South Africa.

References

* Lussi M. (2001) Revision of the genus Aesopus Gould, 1860 in South Africa with the description of a new species (Gastropoda: Prosobranchia: Neogastropoda). Malacologia Mostra Mondiale 35: 23–28. * Kilburn R.N. & Marais J.P. (2010) Columbellidae. pp. 60–104, in: Marais A.P. & Seccombe A.D. (eds), Identification guide to the seashells of South Africa. Volume 1. Groenkloof: Centre for Molluscan Studies. 376 pp.

External links

* {{Portal bar, Gastropods, Marine life algoensis Gastropods described in 1892 Gastropods of Africa Endemic molluscs of South Africa