Astralium pileolum | |
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Apertural view of Astralium pileolum | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Clade: | Vetigastropoda |
Order: | Trochida |
Superfamily: | Trochoidea |
Family: | Turbinidae |
Genus: | Astralium |
Species: | A. pileolum |
Binomial name | |
Astralium pileolum (Reeve, 1842) | |
Synonyms [1] | |
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Astralium pileolum, common name the cap trochis shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban 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 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".
The size of the shell varies between 28 mm and 65 mm. The shell resembles the shell of Bellastraea squamifera (Iredale, 1924), with some differences. The shell is grayish white. The sculpture is obsolete above and nearly so below. The keel is very broad and thin. [2]
Bellastraea squamifera, the scaly star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
This marine species is endemic to Australia and occurs off the Northern Territory, Queensland and Western Australia.
The Northern Territory is an Australian territory in the central and central northern regions of Australia. It shares borders with Western Australia to the west, South Australia to the south, and Queensland to the east. To the north, the territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, including Western New Guinea and other Indonesian islands. The NT covers 1,349,129 square kilometres (520,902 sq mi), making it the third-largest Australian federal division, and the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 246,700, making it the least-populous of Australia's eight states and major territories, with fewer than half as many people as Tasmania.
Queensland is the second-largest and third-most populous state in the Commonwealth of Australia. Situated in the north-east of the country, it is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean. To its north is the Torres Strait, with Papua New Guinea located less than 200 km across it from the mainland. The state is the world's sixth-largest sub-national entity, with an area of 1,852,642 square kilometres (715,309 sq mi).
Western Australia is a state occupying the entire western third of Australia. It is bounded by the Indian Ocean to the north and west, and the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Australia is Australia's largest state, with a total land area of 2,529,875 square kilometres, and the second-largest country subdivision in the world, surpassed only by Russia's Sakha Republic. The state has about 2.6 million inhabitants – around 11 percent of the national total – of whom the vast majority live in the south-west corner, 79 per cent of the population living in the Perth area, leaving the remainder of the state sparsely populated.
Conus spectrum, common name the spectre cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
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Astralium saturnum is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
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Bolma modesta, common name the modest bolma, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
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Turbo haynesi, common name Hayne's turban, is a species of sea snail, marine gastropod mollusk in the family Turbinidae.
Turbo militaris, common name the military turban, is a species of sea snail, marine gastropod mollusk in the family Turbinidae.
Turbo intercostalis, common name the ribbed turban, is a species of sea snail, marine gastropod mollusk in the family Turbinidae.
Trochus nigropunctatus, common name the black-spotted topshell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Astralium asteriscum is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Astralium confragosum is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Astralium heimburgi is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Astralium okamotoi is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Astralium rotularium, common name the rotary star shell or the knob star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Bolma henica, common name the deep sea star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.
Liotina peronii, common names: Peron's delphinula, wheel shell and large liotia, is a species of small sea snail, a marine gastropod mollusk, in the family Liotiidae.