Curtitoma ovalis

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Curtitoma ovalis
Curtitoma ovalis 001.jpg
Image of a shell of Curtitoma ovalis
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Mangeliidae
Genus: Curtitoma
Species:C. ovalis
Binomial name
Curtitoma ovalis
(Friele, 1877)
Synonyms [1]
  • Bela pygmaeaVerrill, 1882
  • Bela pygmaea var. attenuata Locard, 1897
  • Oenopota ovalis(Friele, 1877)
  • Pleurotoma exiguaJeffreys, 1883
  • Pleurotoma (Bela) ovalisFriele, 1877 (original combination)
  • Propebela pygmaea(A. E. Verrill, 1882)

Curtitoma ovalis is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. [1]

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".

Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea.

Contents

Description

The length of the shell varies between 4.8 mm and 5.5 mm.

The very small shell has a fusiform or subovate shape. with four of five convex whorls, a very short spire, and a large body whorl. The sculpture is very finely cancellated or reticulated. The whorls are usually rather evenly rounded, moderately convex, but often have a very slightly marked, rounded shoulder. The suture is somewhat impressed, rather oblique. The protoconch is relatively not small, with the apex not prominent, so that it appears to be obtuse, or rounded, smooth, and glassy. The whole surface below the protoconch is covered by fine, raised, revolving cinguli, separated by slight grooves of about the same width, and by equally fine, slightly sinuous, transverse riblets, coincident with the lines of growth, and receding in a distinct curve on the subsutural band. The crossing of these two sets of lines produces a finely cancellated sculpture over the whole surface, but the transverse lines are usually more evident on the convexity of the whorls, while the spiral lines are more conspicuous anteriorly, and on the siphon. The aperture is relatively large, oblong-elliptical, slightly obtusely angled posteriorly. The sinus is shallow, but distinct, evenly concave. The outer lip is elsewhere evenly convex. The siphonal canal is short and broad, not constricted at the base by any incurvature of the outer lip. The columella is strongly concave or excavated, in the middle, sigmoid anteriorly. The color of shell is pale greenish white, covered by a thin epidermis of similar color. [2] The operculum ear is shaped with a central ridge.

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.

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.

Body whorl

The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk.

Distribution

This species occurs in the bathyal and abyssal parts of the Arctic Ocean (at depths between 557 m and 4734 m), Northwest Atlantic Ocean and off Iceland and Portugal

Arctic Ocean The smallest and shallowest of the worlds five major oceans, located in the north polar regions

The Arctic Ocean is the smallest and shallowest of the world's five major oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea or simply the Arctic Sea, classifying it a mediterranean sea or an estuary of the Atlantic Ocean. It is also seen as the northernmost part of the all-encompassing World Ocean.

Iceland island republic in Northern Europe

Iceland is a Nordic island country in the North Atlantic, with a population of 348,580 and an area of 103,000 km2 (40,000 sq mi), making it the most sparsely populated country in Europe. The capital and largest city is Reykjavík, with Reykjavík and the surrounding areas in the southwest of the country being home to over two-thirds of the population. Iceland is volcanically and geologically active. The interior consists of a plateau characterised by sand and lava fields, mountains, and glaciers, and many glacial rivers flow to the sea through the lowlands. Iceland is warmed by the Gulf Stream and has a temperate climate, despite a high latitude just outside the Arctic Circle. Its high latitude and marine influence keep summers chilly, with most of the archipelago having a tundra climate.

Portugal Republic in Southwestern Europe

Portugal, officially the Portuguese Republic, is a country located mostly on the Iberian Peninsula in southwestern Europe. It is the westernmost sovereign state of mainland Europe. It is bordered to the west and south by the Atlantic Ocean and to the north and east by Spain. Its territory also includes the Atlantic archipelagos of the Azores and Madeira, both autonomous regions with their own regional governments.

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References

  1. 1 2 Curtitoma ovalis (Friele, 1877) .  Retrieved through: World Register of Marine Species  on 8 August 2011.
  2. ↑ Verrill, A. E. 1882. Catalogue of marine Mollusca added to the fauna of the New England region, during the past ten years. Transactions of the Connecticut Academy of Arts and Sciences 5: 451-587, pls. 42-44, 57-58 (described as Bela pygmaea)

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