Atys convexa

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Atys convexa
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked):clade Heterobranchia
informal group Opisthobranchia
clade Cephalaspidea
Superfamily: Haminoeoidea
Family: Haminoeidae
Genus: Atys (gastropod)
Species:A. convexa
Binomial name
Atys convexa
H.B. Preston, 1908

Atys convexa is a species of small tropical sea snail, a bubble snail, a marine opisthobranch gastropod mollusk in the family Haminoeidae, the haminoea bubble snails. [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.

Haminoeidae family of molluscs

Haminoeidae, commonly known as the haminoeid bubble snail family, is a taxonomic family of sea snails, marine opisthobranch gastropod mollusks in the superfamily Haminoeoidea.

Contents

Distribution

This marine species occurs off the Andaman Islands.

Andaman Islands archipelago in the Bay of Bengal

The Andaman Islands form an archipelago in the Bay of Bengal between India, to the west, and Myanmar, to the north and east. Most are part of the Andaman and Nicobar Islands Union Territory of India, while a small number in the north of the archipelago, including the Coco Islands, belong to Myanmar.

Description

The length of the shell of this species attains 3.25 mm, its diameter 2 mm.

(Original description) The umbilicate shell is tumid, ovate and constricted at the ends. It hasa pale lemon colour, with two irregular narrow greenish bands especially noticeable on the ventral surface. It is smooth, polished except at the ends where it is spirally grooved. The apex is closed. The aperture is narrow above but broadening below. The columella descends obliquely, curved outwards and produced. The peristome is simple, rising high above the vertex. [1]

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.

Aperture (mollusc) The main opening of the shell, where the head-foot part of the body of the animal emerges

The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc.

Columella (gastropod)

The columella or pillar is a central anatomical feature of a coiled snail shell, a gastropod shell. The columella is often only clearly visible as a structure when the shell is broken, sliced in half vertically, or viewed as an X-ray image.

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References