Tiberia paumotensis

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Tiberia paumotensis
Tiberia paumotensis 001.png
Drawing of a shell of Tiberia paumotensis
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked):clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily: Pyramidelloidea
Family: Pyramidellidae
Genus: Tiberia
Species:T. paumotensis
Binomial name
Tiberia paumotensis
(Tryon, 1886)
Synonyms
  • Pyramidella hyalina Garrett
  • Pyramidella paumotensis Tryon, 1886 (basionym)

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

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 thin, smooth, white shell is hyaline. Its length measures 10 mm. The upper whorls suddenly taper to an acute apex. The base of the shell is slightly produced. The teleoconch contains nine convex whorls. The suture is margined. The columella is slightly callous, with two oblique plaits, the lower one most conspicuous, the upper smaller and deep-seated. [2]

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.

In anatomy, a suture is a fairly rigid joint between two or more hard elements of an organism, with or without significant overlap of the elements.

Distribution

The type species has been found in the Pacific Ocean off the Tuamotus.

Tuamotus archipelago in French Polynesia

The Tuamotus, also referred to in English as the Tuamotu Archipelago or the Tuamotu Islands, are a French Polynesian chain of almost 80 islands and atolls forming the largest chain of atolls in the world. This archipelago in the southern Pacific Ocean stretches from the northwest to the southeast over an area roughly the size of Western Europe. The total area of land within this chain is 850 square kilometres, with its major islands being Anaa, Fakarava, Hao and Makemo.

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References