Tibersyrnola unifasciata

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Tibersyrnola unifasciata
Eulimella unifasciata 002.png
Drawing of a shell of Tibersyrnola unifasciata
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Infraclass: Euthyneura
Order: Panpulmonata
Family: Pyramidellidae
Genus: Tibersyrnola
Species:
T. unifasciata
Binomial name
Tibersyrnola unifasciata
(Forbes, 1844)
Synonyms [1]
  • Eulima unifasciataForbes, 1844 (original combination)
  • Eulimella unifasciatavan Aartsen, 1994
  • Odostomia crassaJeffreys, 1884 (invalid: junior homonym of Odostomia crassaThompson, 1845; Syrnola wenzi is a replacement name)
  • Odostomia unifasciata(Forbes, 1844)
  • Pyramidella smithiVerrill, 1881
  • Pyramidella unifasciata(Forbes, 1844)
  • Syrnola cinctaFenaux, 1942 (dubious synonym)
  • Syrnola smithi A. E. Verrill, 1881
  • Syrnola unifasciata(Forbes, 1844)
  • Turbonilla unifasciata(Forbes, 1844)

Tibersyrnola unifasciata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [1] [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.

Family is one of the eight major hierarcical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".

Contents

Description

The shell is smooth and polished. It is white, with a median, narrow, light chestnut band. The teleoconch contains 11 flattened whorls. The length of the shell varies between 3 mm and 6.5 mm. [4]

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.

Distribution

This marine species occurs in rather deep water (200m - 700m) in the following locations: [1]

Azores Portuguese archipelago in the North Atlantic Ocean

The Azores, officially the Autonomous Region of the Azores, is one of the two autonomous regions of Portugal. It is an archipelago composed of nine volcanic islands in the North Atlantic Ocean about 1,360 km (850 mi) west of continental Portugal, about 1,643 km (1,021 mi) west of Lisbon, in continental Portugal, about 1,507 km (936 mi) northwest of Morocco, and about 1,925 km (1,196 mi) southeast of Newfoundland, Canada.

Canary Islands Archipelago in the Atlantic and autonomous community of Spain

The Canary Islands is a Spanish archipelago and the southernmost autonomous community of Spain located in the Atlantic Ocean, 100 kilometres west of Morocco at the closest point. The Canary Islands, which are also known informally as the Canaries, are among the outermost regions (OMR) of the European Union proper. It is also one of the eight regions with special consideration of historical nationality recognized as such by the Spanish Government. The Canary Islands belong to the African Plate like the Spanish cities of Ceuta and Melilla, the two on the African mainland.

Mauritania Islamic republic in Northwest Africa

Mauritania is a country in Northwest Africa. It is the eleventh largest sovereign state in Africa and is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the northeast, Mali to the east and southeast, and Senegal to the southwest.

Notes

Additional information regarding this species: [1]

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References

  1. 1 2 3 4 Bouchet, P. (2015). Tibersyrnola unifasciata (Forbes, 1844). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=768168 on 2015-04-19
  2. Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180-213
  3. Peñas A. & Rolán E. (1997) La familia Pyramidellidae Gray, 1840 (Mollusca, Gastropoda, Heterostropha) en Africa occidental. 2. Los géneros Turbonilla y Eulimella. Iberus suplemento 3: 1-105. [5 June 1997]
  4. G.W. Tryon , Manual of Conchology vol. VIII p. 341; 1889