''Anatoma aedonia'' is a species of minute

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 Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

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 or

micromollusk A micromollusk is a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also ...

in the family

Anatomidae Anatomidae is a family of minute sea snails, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Anatomidae was raised to the rank of subfamily to the rank of family ...

.Rosenberg, G. (2012). ''Anatoma aedonia''. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=493001 on 2013-02-16

Description

The length of the white shell reaches 2.5 mm. The shell has a depressedly globose shape. It is strongly sculptured, with a rather high scalar spire, exserted

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, a very sharp and expressed carina, a minute tabulated apex, a strong and impressed suture, a tumid base, and a large pervious but half covered umbilicus. The radiating ribs are pretty strong, sharp, and equal above and below the canal. The whole surface is closely sharply, and regularly scored with fine threads, which are a little stronger (but not quite so sharp) on the base than above. The spire is high, scalar, each whorl rising and expanding above the suture. The apex is very small and tabulated. The five whorls slope down flatly (barely convex) from the suture. They are very sharply carinated at the canal, the under edge of which in particular is prominent and expressed. Below the canal they contract into the suture. The base of the shell is tumid. The suture is strongly impressed and very distinct. The aperture is quite round. The outer lip is thin, and regularly arched. The inner lip on the body is thin, and very short, It is regularly curved throughout, on the columellar lip.G.W. Tryon (1890), Manual of Conchology vol. XII
(described as ''Scissurella aedonia'')

Distribution

This species occurs in the Atlantic Ocean off North Carolina, USA to Puerto Rico; off Brazil; off the Azores; off

Tristan de Cunha Tristan da Cunha (), colloquially Tristan, is a remote group of volcanic islands in the South Atlantic Ocean. It is the most remote inhabited archipelago in the world, lying approximately from Cape Town in South Africa, from Saint Helena a ...

at depths between 166 m and 640 m.

References

External links

To Encyclopedia of Life

To USNM Invertebrate Zoology Mollusca Collection

To World Register of Marine Species
* {{Taxonbar, from=Q13370617 Anatomidae Gastropods described in 1886