Nisiturris crystallina

Last updated

Nisiturris crystallina
Turbonilla crystallina 001.png
Drawing of a shell of Nisiturris crystallina
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Heterobranchia
Clade: Euthyneura
Order: Panpulmonata
Family: Pyramidellidae
Genus: Nisiturris
Species:N. crystallina
Binomial name
Nisiturris crystallina
(Dall & Bartsch, 1906) [1]
Synonyms [2]
  • Chemnitzia crystallina Dunker, 1869
  • Turbonilla lydiaThiele, 1925
  • Turbonilla (Nisiturris) crystallina Dall & Bartsch, 1906 (basionym)

Nisiturris crystallina is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [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 hierarchical 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

Pupoid protoconch (enlarged) of Nisiturris crystallina Turbonilla crystallina protoconch.png
Pupoid protoconch (enlarged) of Nisiturris crystallina

The very slender and thin, almost transparent shell has an elongate-conic shape. Its length varies between 2.9 mm and 4.5 mm. It is slightly umbilicated. The smooth whorls of the protoconch are large, and very much elevated. They are coiled to resemble a small sinistral pupa. This pupoid shape makes this species peculiar, as most species in Turbonilla have a helicoid or planorboid protoconch. It is situated obliquely upon the spire of the whorls of the teleoconch and extending considerably beyond the lateral outline of this. The 12 whorls of the teleoconch are situated rather high between the sutures, somewhat overhanging (this is particularly true of the earlier volutions), and slightly shouldered at the summit. They are ornamented by strong, oblique, rounded axial ribs, which are slightly cusped at their posterior extremity, where they show a tendency toward becoming fused at the periphery. Twenty-two of these ribs occur upon the first (this whorl is more rounded than the rest and closer ribbed), fourteen upon the second, twelve upon the fifth, sixteen upon the tenth, and twenty upon the penultimate whorl. The intercostal spaces are twice as wide as the ribs, decidedly depressed, smooth, and terminating at the fusing point of the ribs on the periphery. The summits of succeeding whorls fall somewhat anterior to the periphery of the preceding whorl and give the whorls an overhanging effect as well as a narrow smooth band between the anterior termination of the intercostal spaces and the subchanneled sutures. The periphery and the base of the body whorl are well rounded, the latter very short, marked only by faint lines of growth. The aperture is very large, almost circular in outline. The outer lip is thin, transparent, and showing the external sculpture within. The columella is thin, curved and revolute, with a slight oblique fold near its insertion. The parietal wall is covered by a mere film of callus. [1]

Umbilicus (mollusc)

The umbilicus of a shell is the axially aligned, hollow cone-shaped space within the whorls of a coiled mollusc shell. The term umbilicus is often used in descriptions of gastropod shells, i.e. it is a feature present on the ventral side of many snail shells, including some species of sea snails, land snails, and freshwater snails.

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.

Protoconch

A protoconch is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called "nucleus". The protoconch may sometimes consist of several whorls, but when this is the case, the whorls show no growth lines.

Distribution

This species occurs in the Pacific Ocean off Indonesia, Samoa, Vanuatu; Fiji and the Solomons

Indonesia Republic in Southeast Asia

Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia, between the Indian and Pacific oceans. It is the world's largest island country, with more than seventeen thousand islands, and at 1,904,569 square kilometres, the 14th largest by land area and the 7th largest in combined sea and land area. With over 261 million people, it is the world's 4th most populous country as well as the most populous Muslim-majority country. Java, the world's most populous island, is home to more than half of the country's population.

Samoa country in Oceania

Samoa, officially the Independent State ofSamoa and, until 4 July 1997, known as Western Samoa, is a country consisting of two main islands, Savai'i and Upolu, and four smaller islands. The capital city is Apia. The Lapita people discovered and settled the Samoan Islands around 3,500 years ago. They developed a unique Samoan language and Samoan cultural identity.

Vanuatu Country in Oceania

Vanuatu, officially the Republic of Vanuatu, is a Pacific island country located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is 1,750 kilometres (1,090 mi) east of northern Australia, 540 kilometres (340 mi) northeast of New Caledonia, east of New Guinea, southeast of the Solomon Islands, and west of Fiji.

Related Research Articles

Turbonilla abseida is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla aculeus is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla approximata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla asser is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla baegerti is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla barkleyensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla centrota</i> species of mollusc

Turbonilla centrota is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla diegensis</i> species of mollusc

Turbonilla diegensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla dina is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla galianoi is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla genilda</i> species of mollusc

Turbonilla genilda is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla adaba</i> species of mollusc

Turbonilla adaba is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla gracilior</i> species of mollusc

Turbonilla gracilior is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla histias</i> species of mollusc

Turbonilla histias is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla lara</i> species of mollusc

Turbonilla lara is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla marshalli is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla muricatoides</i> species of mollusc

Turbonilla muricatoides is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Turbonilla newcombei</i> species of mollusc

Turbonilla newcombei is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla nuttalli is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Turbonilla nuttingi is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

References

  1. 1 2 Dall & Bartsch (1906), Notes on Japanese, Indopacific, and American Pyramidellidæ; Proceedings of the National Museum, vol. XXX # 1452; p. 341 (described as Turbonilla crystallina)
  2. 1 2 Bouchet, P. (2015). Nisiturris crystallina (Dall & Bartsch, 1906). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=731032 on 2015-04-08
  3. ↑ Peñas A. & Rolán E. (2010) Deep water Pyramidelloidea of the Tropical South Pacific: Turbonilla and related genera. In: Gofas S. (ed.) Tropical Deep Sea Benthos 26. Mémoires du Muséum National d'Histoire Naturelle 200:1-436.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.