Curtitoma hebes

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Curtitoma hebes
Curtitoma hebes 001.jpg
Original image of a shell of Curtitoma hebes
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. hebes
Binomial name
Curtitoma hebes
(Verrill, 1880)
Synonyms [1]

Bela hebesVerrill, 1880

Curtitoma hebes 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 6 mm and 9 mm.

(Original description) The shell has a short-fusiform or subovate shape, with a short, blunt spire, and with five or six convex, but slightly angled or carinated whorls, which have a slightly flattened subsutural band. The suture is impressed and slightly channelled. The sculpture shows numerous small, regular, raised, spiral ridges, separated by wider grooves. Usually one, just below the subsutural band, is stronger and more raised, forming a slight carina. On the subsutural band they are faint, or indistinct. The spiral lines are often decussated, more or less, by equally slender, transverse, raised riblets, coincident with the lines of growth, but not uniformly present. These may produce a slightly cancellated structure, on all the whorls, and extend as curved riblets, across the subsutural band. The whorls of the protoconch are not preserved in any of the holotype specimens. The aperture is short and narrow-ovate. The outer lip is expanded below the suture, then regularly rounded and thin. The posterior sinus is broad and shallow. The straight siphonal canal is very short and rather broad. The columella is sigmoid and regularly incurved. The epidermis is thin and greenish white. [2]

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.

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 is amphiboreal and occurs in the Northwest Atlantic Ocean and the Gulf of Maine; also reported from the Sea of Japan; found at depths between 100 m and 1320 m.

Gulf of Maine A large gulf of the Atlantic Ocean on the east coast of North America

The Gulf of Maine is a large gulf of the Atlantic Ocean on the east coast of North America. It is bounded by Cape Cod at the eastern tip of Massachusetts in the southwest and by Cape Sable Island at the southern tip of Nova Scotia in the northeast. The gulf includes the entire coastlines of the U.S. states of New Hampshire and Maine, as well as Massachusetts north of Cape Cod, and the southern and western coastlines of the Canadian provinces of New Brunswick and Nova Scotia, respectively.

Sea of Japan Marginal sea between Japan, Russia and Korea

The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula and Russia. The Japanese archipelago separates the sea from the Pacific Ocean. It is bordered by Japan, Korea and Russia. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific Ocean. This isolation also reflects in the fauna species and in the water salinity, which is lower than in the ocean. The sea has no large islands, bays or capes. Its water balance is mostly determined by the inflow and outflow through the straits connecting it to the neighboring seas and Pacific Ocean. Few rivers discharge into the sea and their total contribution to the water exchange is within 1%.

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References

  1. 1 2 Curtitoma hebes (Verrill, 1880) .  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


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