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Agagus Agagus
''Agagus agagus'' is a species of sea snail, a marine gastropod mollusk in the family (biology), family Trochidae, the top snails. Description The shell grows to a length of 9 mm, its diameter 10 mm. The umbilicate shell has a depressed conical shape with a swollen base. Its color is a vivid white with green spots. It contains 6½ sharp declining Whorl (mollusc), whorls with longitudinal oblique striae and spiral ribs. The Aperture (mollusc), aperture is subquadrangular. The outer Lip (gastropod), lip is sharp. Distribution This species occurs in the Red Sea and in the Indian Ocean off Tanzania and South Africa. References * Kilburn, R. N. 1972. ''Taxonomic notes on South African marine Mollusca (2), with the description of new species and subspecies of Conus, Nassarius, Vexillum and Demoulia''. Annals of the Natal Museum 21(2):391-437, 15 figs * Kilburn, R.N. & Rippey, E. (1982) ''Sea Shells of Southern Africa''. Macmillan South Africa, Johannesburg, xi + 249 pp. pag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
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. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
