''Terebra anilis'' 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 ...

mollusc 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 esti ...

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 ...

Terebridae The Terebridae, commonly referred to as auger shells or auger snails, is a group or family of small to large predatory marine gastropods in the superfamily Conoidea.Gofas, S. (2012). Terebridae. World Register of Marine Specie2012-10-12 These ga ...

, the auger snails.MolluscaBase eds. (2020). MolluscaBase. Terebra anilis (Röding, 1798). Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=447405 on 2020-01-29

Description

The length of the shell varies between 15 mm and 111 mm. (Original description) The narrowly subulate shell is reddish brown. It contains 21 very flat

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. These are sculptured with oblique, rather closely set transverse costae interrupted by spiral striae and two crenate sutural bands, the upper of which is much the broader. The sutures are scarcely impressed. The

columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the wo ...

descendis in a curve, extending into a thick, projecting callus which joins the

lip The lips are the visible body part at the mouth of many animals, including humans. Lips are soft, movable, and serve as the opening for food intake and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can be ...

above. The

peristome Peristome (from the Greek ''peri'', meaning 'around' or 'about', and ''stoma'', 'mouth') is an anatomical feature that surrounds an opening to an organ or structure. Some plants, fungi, and shelled gastropods have peristomes. In mosses In mosses, ...

is sinuous and slightly reflexed. 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 narrowly ovate. The

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...

is short and recurved Preston, H. B. "Descriptions of new species of land, marine and freshwater shells from the Andaman Islands." Records of the Indian Museum 2.2 (1908): 187-210
(described as ''Terebra rubrobrunnea'')

Distribution

This marine species occurs in the Central Indo-West Pacific.

References

* Bratcher T. & Cernohorsky W.O. (1987). ''Living terebras of the world. A monograph of the recent Terebridae of the world.'' American Malacologists, Melbourne, Florida & Burlington, Massachusetts. 240pp * Liu, J.Y. uiyu(ed.). (2008). ''Checklist of marine biota of China seas''. China Science Press. 1267 pp * Kilburn, R.N. & Rippey, E. (1982) ''Sea Shells of Southern Africa.'' Macmillan South Africa, Johannesburg, xi + 249 pp.

External links

*
Lamarck, J.-B. de. (1822). Histoire naturelle des animaux sans vertèbres, présentant les caractères généraux et particuliers de ces animaux, leur distribution, leurs classes, leurs familles, leurs genres, et la citation des principales espèces qui s'y rapportent; précédée d'une introduction offrant la détermination des caractères essentiels de l'animal, sa distinction du végétal et des autres corps naturel; enfin, l'exposition des principes fondamentaux de la zoologie. Tome septième. 711 pp. Paris

Fedosov, A. E.; Malcolm, G.; Terryn, Y.; Gorson, J.; Modica, M. V.; Holford, M.; Puillandre, N. (2020). Phylogenetic classification of the family Terebridae (Neogastropoda: Conoidea). Journal of Molluscan Studies
{{Taxonbar, from=Q5120954, from2=Q11070451 Terebridae Gastropods described in 1798