|
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] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serranus
''Serranus'' is a genus of fish in the family Serranidae. It is one of five genera known commonly as the "Atlantic dwarf sea basses". These fish are hermaphrodites, each individual possessing functional male and female reproductive tissues. When a pair spawns, one fish acts as a male and the other acts as a female.García-Díaz, M., González, J.A., Lorente, M.J. & Tuset, V.M. (2006)Spawning season, maturity sizes, and fecundity in blacktail comber (''Serranus atricauda'') (Serranidae) from the eastern-central Atlantic.''Fishery Bulletin, 104 (2): 159-166.'' Species There are currently 31 recognized species in this genus: * ''Serranus accraensis'' (Norman, 1931) (Ghanean comber) * ''Serranus aequidens'' C. H. Gilbert, 1890 (Deep-water bass) * ''Serranus aliceae'' Carvalho-Filho & C. E. L. Ferreira, 2013 * ''Serranus annularis'' ( Günther, 1880) (Orange-back bass) * ''Serranus atricauda'' Günther, 1874 (Blacktail comber) * ''Serranus atrobranchus'' ( Cuvier, 1829) (Black-ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
