Bela obliquigradata

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Bela obliquigradata
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Mangeliidae
Genus: Bela
Species:
B. obliquigradata
Binomial name
Bela obliquigradata
Smith, E.A., 1884

Bela obliquigradata 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 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".

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 attains 10 mm, its diameter 4 mm. The short shell has an ovate-fusiform shape. It has a pale reddish color. It contains six whorls. The two protoconch whorls are large, smooth, and white. In the third and fourth whorls the spiral lirations are about two or three in number, one encircling the angulation and the rest below it. They are rather stronger than the longitudinal ribs (about 20) and give the whorls a cancellated aspect. In the body whorl these lirae are much finer, very numerous, and closely packed. The aperture is small, narrow. The siphonal canal is short and narrow. [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.

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.

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

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References

  1. ↑ Worldwide Mollusc Data base: Bela obliquigradata
  2. ↑ Smith, Edgar A. (1884). "Diagnoses of new Species of Pleurotomidae in the British Museum". The Annals and Magazine of Natural History: Including Zoology, Botany, and Geology. vol. 14 ser. 5.
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