|
Bracteacoccus Polaris
''Bracteacoccus'' is a genus of green algae, the sole genus of the family Bracteacoccaceae. It is a terrestrial alga commonly found in soils, from the tropics to the poles. History ''Bracteacoccus'' was described by E. Tereg in 1922, based on the species ''Bracteacoccus aggregatus''. The name comes from the Latin term ''bractea'', meaning a thin metal plate, and Greek ''kokkos'', meaning berry. Later it was synonymized with the genus ''Dictyococcus'', until Richard C. Starr reestablished the genus. Description ''Bracteacoccus'' consists of solitary, typically spherical cells from 4 to 110 μm in diameter. Mature cells have multiple cell nucleus, nuclei (i.e. are multinucleate). Each cell has multiple chloroplasts lining the outer wall of the cell; each chloroplast is angular in shape and lacks pyrenoids. ''Bracteacoccus'' reproduces asexually by producing zoospores. The zoospores have two flagella which are slightly unequal in length. ''Bracteacoccus'' may also reproduce by prod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
|
 |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. 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 of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |