Anatoma aedonia

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Anatoma aedonia
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Clade: Lepetellida
Superfamily: Scissurelloidea
Family: Anatomidae
Genus: Anatoma
Species:
A. aedonia
Binomial name
Anatoma aedonia
(Watson, 1886) [1]
Synonyms [2]
  • Scissurella aedoniaWatson, 1886

Anatoma aedonia is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Anatomidae. [2] [3]

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 sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. While these definitions may seem adequate, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clone is potentially a microspecies.

Sea snail common name for snails that normally live in saltwater

Sea snail is a common name for snails that normally live in salt water, in other words marine gastropods. The taxonomic class Gastropoda also includes snails that live in other habitats, such as land snails and freshwater snails. Many species of sea snails are edible and exploited as food sources by humans.

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 reach adult size at very small dimensions.

Contents

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 whorls, 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. [4]

Spire (mollusc)

A spire is a part of the coiled shell of molluscs. The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation of 360°. A spire is part of the shell of a snail, a gastropod mollusc, a gastropod shell, and also the whorls of the shell in ammonites, which are fossil shelled cephalopods.

Whorl (mollusc)

A whorl is a single, complete 360° revolution or turn in the spiral growth of a mollusc shell. A spiral configuration of the shell is found in of numerous gastropods, but it is also found in shelled cephalopods including Nautilus, Spirula and the large extinct subclass of cephalopods known as the ammonites.

In anatomy, an apex is part of the shell of a mollusk. The apex is the pointed tip of the shell of a gastropod, scaphopod, or cephalopod.

Distribution

This species occurs in the Atlantic Ocean off North Carolina, USA to Puerto Rico; off Brazil; off the Azores; off Tristan de Cunha at depths between 166 m and 640 m.

North Carolina State of the United States of America

North Carolina is a state in the southeastern region of the United States. It borders South Carolina and Georgia to the south, Tennessee to the west, Virginia to the north, and the Atlantic Ocean to the east. North Carolina is the 28th-most extensive and the 9th-most populous of the U.S. states. The state is divided into 100 counties. The capital is Raleigh, which along with Durham and Chapel Hill is home to the largest research park in the United States. The most populous municipality is Charlotte, which is the second-largest banking center in the United States after New York City.

Puerto Rico Unincorporated territory of the United States

Puerto Rico, officially the Commonwealth of Puerto Rico and briefly called Porto Rico, is an unincorporated territory of the United States located in the northeast Caribbean Sea, approximately 1,000 miles (1,600 km) southeast of Miami, Florida.

Brazil Federal republic in South America

Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. At 8.5 million square kilometers and with over 208 million people, Brazil is the world's fifth-largest country by area and the fifth most populous. Its capital is Brasília, and its most populated city is São Paulo. The federation is composed of the union of the 26 states, the Federal District, and the 5,570 municipalities. It is the largest country to have Portuguese as an official language and the only one in the Americas; it is also one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world.

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References

  1. ↑ Watson, R. B. 1886. Report on the Scaphopoda and Gasteropoda collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger, Zoology 15(2): i-v, 1-680, 692-756, 50 pls. Her Majesty's Government: London.
  2. 1 2 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
  3. ↑ Natural History Museum, London (NHM): Collections Management Database System
  4. ↑ G.W. Tryon (1890), Manual of Conchology vol. XII (described as Scissurella aedonia)
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