|
Acteon Antarcticus
''Acteon antarcticus'' is a species of sea snail, a marine gastropod mollusc in the family (biology), family Acteonidae. Description The length of the shell attains 6.6 mm. Distribution This marine species occurs in subantarctic waters, found at depths of 120 to 340 m References * Engl, W. (2012). Shells of Antarctica. Hackenheim: Conchbooks. 402 pp. External links Thiele, J. (1912). Die antarktischen Schnecken und Muscheln. Deutsche Südpolar-Expedition 1901-1903. Wissenschaftliche Ergebnisse. 13, Zoologie. 5(2): 185-285, pls 11-19 Acteon, antarcticus Gastropods described in 1912 {{Heterobranchia-stub ... [...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] |
