''Terebra anilis'' 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 ...

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

, 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). In nature File:Photograph and axial plane floral diagra ...

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: ) 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 ...

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

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 ...

above. The

peristome Peristome (from the Greek language, 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 mo ...

is sinuous and slightly reflexed. 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 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 i ...

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