|
Pleurotomella Orthocolpa
''Pleurotomella orthocolpa'' is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description Distribution Fossils of this marine species were found in Eocene strata of Loire-Atlantique Loire-Atlantique (; br, Liger-Atlantel; before 1957: ''Loire-Inférieure'', br, Liger-Izelañ, link=no) is a department in Pays de la Loire on the west coast of France, named after the river Loire and the Atlantic Ocean. It had a population o ..., France. References * Cossmann (M.), 1919 ''Supplément aux mollusques éocèniques de la Loire-Inférieure.'' Bulletin de la Société des Sciences Naturelles de l'Ouest de la France, sér. 3, t. 5, p. 53-141 orthocolpa Gastropods described in 1902 {{Pleurotomella-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] |
