|
''Collodictyon'' is a basal genus of single-celled eukaryotes not closely related to any heretofore known kingdom of that domain. ==Taxonomy and phylogeny== |2= |2=Collodictyon }} }} }} }} Three species are currently recognised in this genus. The type species is ''Collodictyon triciliatum''. A second species—''Collodictyon sparsevacuolatum''—named by Skuja is also recognised; this species is found in freshwater in the United States and Europe. A third species ''Collodictyon sphaericum'' has been described but its description is in doubt. A fourth species—''Collodictyon hongkongense''—has been described by Skvortzow but this description is considered inadequate and this species is regarded as being of dubious validity. Along with the genus ''Diphylleia'', this organism appears to be only distantly related to the other eukaryotes.〔(Live Science Strange, Organism Has Unique Roots in the Tree of Life ), by Jennifer Welsh, 29 April 2012〕 They share some morphological features with the species currently placed within the Excavata. However this latter clade is considered to be polyphyletic and in need of resolution (reorganisation into different groups). For this reason inclusion of this genus within the excavates may not assist in understanding its phylogenetic position. Brugerolle has proposed a family, ''Collodictyonidae'' for this genus and ''Diphylleia''.〔 Another genus that is related to ''Collodictyon'' is ''Sulcomonas. Scientists speculate that further study of ''Collodictyon'' may yield insights into the prehistoric beginnings of life hundreds of millions of years ago.〔 Scientists from Norway have been studying a particular type of ''Collodictyon'' found living in sludge in Årungen, a lake in the municipality of Ås in Norway.〔〔 Original Norwegian press release with pictures of researchers.〕 Kamran Shalchian-Tabrizi, the leader of the Microbial Evolution Research Group (MERG), has claimed that these organisms resemble the basal eukaryote.〔(【引用サイトリンク】title=Scientists find 'man's remotest relative' in lake sludge )〕 Collodictyon appears related to Malawimonas which is related to Amoebozoa. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Collodictyon」の詳細全文を読む スポンサード リンク
|