|
Collodictyon
''Collodictyon'' is a genus of single-celled, omnivorous eukaryotes belonging to the collodictyonids, also known as diphylleids. Due to their mix of cellular components, Collodictyonids do not belong to any well-known kingdom-level grouping of that domain and this makes them distinctive from other families. Recent research places them in a new 'supergroup' together with rigifilids and ''Mantamonas'', with the so-far informal name 'CRuMs'. Taxonomy and phylogeny 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 re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collodictyon Triciliatum
''Collodictyon'' is a genus of single-celled, omnivorous eukaryotes belonging to the collodictyonids, also known as diphylleids. Due to their mix of cellular components, Collodictyonids do not belong to any well-known kingdom-level grouping of that domain and this makes them distinctive from other families. Recent research places them in a new 'supergroup' together with rigifilids and ''Mantamonas'', with the so-far informal name ' CRuMs'. Taxonomy and phylogeny 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 i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collodictyonidae
Collodictyonidae (also Diphylleidae) is a group of aquatic, unicellular eukaryotic organisms with two to four terminal flagella. They feed by phagocytosis, ingesting other unicellular organisms like algae and bacteria. The most remarkable fact of this clade is its uncertain position in the tree of life. Recent molecular analyses place Collodictyonids (e.g. Collodictyon) in a clade also containing Rigifilida and Mantamonadidae. This clade has been named CRuMs and is sister to Amorphea. Phylogeny Taxonomy * Class Diphyllatea Cavalier-Smith 2003 nisomonadea; Diphyllatia Cavalier-Smith 2003** Order Diphylleida Cavalier-Smith 1993 ollodictyonida *** Family Sulcomonadidae Cavalier-Smith 2012 **** Genus '' Sulcomonas'' Brugerolle 2006 ***** Species ''S. lacustris'' Brugerolle 2006 *** Family Diphylleidae Cavalier-Smith 1993 ollodictyonidae Brugerolle et al. 2002**** Genus '' Diphylleia'' Massart 1920 non Michaux 1803 'Aulacomonas'' Skuja 1939">Aulacomonas.html" ;"title="'A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CRuMs
CRuMs is a proposed clade of microbial eukaryotes, whose name is an acronym of the following constituent groups: i) collodictyonids also known as diphylleids, ii) rigifilids Rigifilida is a clade of non- ciliate phagotrophic eukaryotes. It consists of two genera: '' Micronuclearia'' and ''Rigifila''. Characteristics Cells of rigifilids are covered with either a single or a double-layered submembrane pellicular lam ... and iii) mantamonadids as sister of the Amorphea. It more or less supersedes Varisulca, as Ancyromonadida are inferred not to be specifically related to the orders Collodictyonida, Rigifilida and Mantamonadida. Phylogeny References {{Taxonbar, from=Q59153571 Eukaryote subphyla Podiata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diphylleia (protist)
''Diphylleia rotans'' is a eukaryotic microorganism. It is notable for having a gene-rich mitochondrial genome, the largest known outside the jakobid Jakobids are an order of free-living, heterotrophic, flagellar eukaryotes in the supergroup Excavata. They are small (less than 15 μm), and can be found in aerobic and anaerobic environments. The order Jakobida, believed to be monophyletic, cons ...s.Janouškovec J, Tikhonenkov DV, Burki F, Howe AT, Rohwer FL, Mylnikov AP, Keeling PJ. "A New Lineage of Eukaryotes Illuminates Early Mitochondrial Genome Reduction", ''Current Biology'' 2017, References External links * {{Taxonbar, from=Q4037390 Podiata Species described in 1920 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unikonta
Amorphea are members of a taxonomic supergroup that includes the basal Amoebozoa and Obazoa. That latter contains the Opisthokonta, which includes the Fungi, Animals and the Choanomonada, or Choanoflagellates. The taxonomic affinities of the members of this clade were originally described and proposed by Thomas Cavalier-Smith in 2002. The International Society of Protistologists, the recognised body for taxonomy of protozoa, recommended in 2012 that the term Unikont be changed to Amorphea because the name "Unikont" is based on a hypothesized synapomorphy that the ISP authors and other scientists later rejected. It includes amoebozoa, opisthokonts, and possibly Apusozoa. Taxonomic revisions within this group Cavalier-Smith has proposed two new phyla: Sulcozoa, which consists of the subphyla Apusozoa (Apusomonadida and Breviatea), and Varisulca, which includes the subphyla Diphyllatea, Discocelida, Mantamonadidae, Planomonadida and Rigifilida. The validity of this proposed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryote
Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard archaea. This implies that there are only two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as flagellated phagotrophs. Their name comes from the Greek εὖ (''eu'', "well" or "good") and κάρυον (''karyon'', "nut" or "kernel"). E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryote
Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard archaea. This implies that there are only two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as flagellated phagotrophs. Their name comes from the Greek εὖ (''eu'', "well" or "good") and κάρυον (''karyon'', "nut" or "kernel"). E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryota
Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard archaea. This implies that there are only two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as flagellated phagotrophs. Their name comes from the Greek εὖ (''eu'', "well" or "good") and κάρυον (''karyon'', "nut" or "kernel"). E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryotes
Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard archaea. This implies that there are only two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as flagellated phagotrophs. Their name comes from the Greek εὖ (''eu'', "well" or "good") and κάρυον (''karyon'', "nut" or "kernel"). Euk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Årungen
Årungen is a lake in Norway in the municipality of Ås about south of Oslo which is notable for being an environment containing microscopic creatures called collodictyons. Norwegian scientists have been studying the creatures for two decades and speculate that they may be one of the oldest known organisms, and may provide clues about the origins of life. One kilometre south of the lake lies the Norwegian University of Life Sciences. The lake's elevation is and it straddles both Ås and Frogn municipalities of Akershus county. The surface area is . Its drainage basin is Østensjøvannet (a small lake in the east) and a number of minor streams. It drains into Årungselva river northward to Bunnefjorden. The eastern shore of the lake has been adapted with strolling paths and picnic areas. The water is shallow and rich with nutrients, and inflow from agriculture annually causes blooms of toxic blue-green algae. Nevertheless the lake is rich in fish life, with northern pike, Eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bikonta
A bikont ("two flagella") is any of the eukaryotic organisms classified in the group Bikonta. Many single-celled members of the group, and the presumed ancestor, have two flagella. Enzymes Another shared trait of bikonts is the fusion of two genes into a single unit: the genes for thymidylate synthase (TS) and dihydrofolate reductase (DHFR) encode a single protein with two functions. The genes are separately translated in unikonts. Relationships Some research suggests that a unikont (a eukaryotic cell with a single flagellum) was the ancestor of opisthokonts (Animals, Fungi, and related forms) and Amoebozoa, and a bikont was the ancestor of Archaeplastida (Plants and relatives), Excavata, Rhizaria, and Chromalveolata. Cavalier-Smith has suggested that Apusozoa, which are typically considered ''incertae sedis'', are in fact bikonts. Relationships within the bikonts are not yet clear. Cavalier-Smith has grouped the Excavata and Rhizaria into the Cabozoa and the Archaepla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amoebozoa
Amoebozoa is a major taxonomic group containing about 2,400 described species of amoeboid protists, often possessing blunt, fingerlike, lobose pseudopods and tubular mitochondrial cristae. In traditional and currently no longer supported classification schemes, Amoebozoa is ranked as a phylum within either the kingdom Protista or the kingdom Protozoa. In the classification favored by the International Society of Protistologists, it is retained as an unranked " supergroup" within Eukaryota. Molecular genetic analysis supports Amoebozoa as a monophyletic clade. Modern studies of eukaryotic phylogenetic trees identify it as the sister group to Opisthokonta, another major clade which contains both fungi and animals as well as several other clades comprising some 300 species of unicellular eukaryotes. Amoebozoa and Opisthokonta are sometimes grouped together in a high-level taxon, variously named Unikonta, Amorphea or Opimoda. Amoebozoa includes many of the best-known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
