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Nassarius Crematus
''Nassarius crematus'', common name the burned nassa, is a species of sea snail, a marine gastropod mollusc in the family (biology), family Nassariidae, the Nassa mud snails or dog whelks. ''Nassarius crematus'' was first described bRichard Brinsley Hindsin 1844 on a voyage in the H.M.S. Sulphur. Description The length of the shell varies between 13 mm and 41 mm. The shell is round and bulbous, with four spires at its top. In many specimens, the outer lip is very large, and the palatal wall takes up most of its front. Distribution This species occurs in the Indian Ocean off Tanzania and the Mascarene Basin; in the Southwest Pacific, off the Philippines and New Guinea and off Japan. It has also been found off the coasts of Hawaii, China, Malaysia, and Thailand. References * Hinds, R.B.(1844-1845). Mollusca. In: The zoology of the voyage of H.M.S. "Sulphur", under the command of Captain Sir Edward Belcher during the years 1836-42. London: Smith, Elder and Co. v + 72 ... [...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] |
