Related Research Articles
The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta, are a clade of algae.
The alveolates are a group of protists, considered a major clade and superphylum within Eukarya, and are also called Alveolata.
Chromista is a biological kingdom consisting of single-celled and multicellular eukaryotic species that share similar features in their photosynthetic organelles (plastids). It includes all protists whose plastids contain chlorophyll c, such as some algae, diatoms, oomycetes, and protozoans. It is probably a polyphyletic group whose members independently arose as separate evolutionary group from the common ancestor of all eukaryotes. As it is assumed the last common ancestor already possessed chloroplasts of red algal origin, the non-photosynthetic forms evolved from ancestors able to perform photosynthesis. Their plastids are surrounded by four membranes, and are believed to have been acquired from some red algae.
Heterokonts are a group of protists. The group is a major line of eukaryotes. Most are algae, ranging from the giant multicellular kelp to the unicellular diatoms, which are a primary component of plankton. Other notable members of the Stramenopiles include the (generally) parasitic oomycetes, including Phytophthora of Great Famine of Ireland infamy and Pythium which causes seed rot and damping off.
The Labyrinthulomycetes (ICBN) or Labyrinthulea (ICZN) are a class of protists that produce a network of filaments or tubes, which serve as tracks for the cells to glide along and absorb nutrients for them. The two main groups are the labyrinthulids and thraustochytrids. They are mostly marine, commonly found as parasites on algae and seagrasses or as decomposers on dead plant material. They also include some parasites of marine invertebrates.
Bicosoecida (ICZN) or Bicosoecales/Bicoecea (ICBN) is an order of Bikosea, a small group of unicellular flagellates, included among the heterokonts. Informally known as bicosoecids, they are a small group of unicellular flagellates, included among the heterokonts. The cells are free-living, with no chloroplasts, and in some genera are encased in a lorica.
Sagenista is a group of heterokonts containing the labyrinthulids and Eogyrea, a class of yet uncultured protists. Originally, it contained the Labyrinthulids and bicosoecids. However at present the bicosoecids have been removed, and Eogyrea were added, in order to make the group monophyletic.
Ochrophyta is a group of mostly photosynthetic heterokonts. Their plastid is of red algal origin.
Pseudofungi is a grouping of heterokonts, also known as the Heterokontimycotina. It consists of the Oomycota and Hyphochytridiomycetes. Although numerous biochemical, ultrastructural, and genetic traits clearly place them in the heterokonts, their growth form and mode of nutrition (osmotrophy) resemble that of fungi.
Bigyra is a heterokont grouping.
Dictyochophyceae sensu lato is a photosynthetic lineage of heterokont algae.
Platysulcidae is a monotypic family of heterokonts that was recently discovered to be the earliest diverging lineage of the Heterokont phylogenetic tree.
Placidozoa is a recently defined non-photosynthetic lineage of Heterokonts.
Bigyromonadea is a recently described non-photosynthetic lineage of Heterokonts that at present contains only one species.
Pirsoniales is a non photosynthetic lineage of Heterokonts.
Chrysomerophyceae is a monotypic class of photosynthetic heterokont eukaryotes.
Rictus is a genus of Bikosea, a small group of unicellular flagellates, included among the heterokonts.
Cyathobodoniae is a subclass of bicosoecids, a small group of unicellular flagellates, included among the heterokonts.
Anoecida is an order of bicosoecids, a small group of unicellular flagellates, included among the heterokonts.
Pseudodendromonadida is a subclass of bicosoecids, a small group of unicellular flagellates, included among the heterokonts.
References
- ↑ Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista). T Cavalier-Smith, EEY Chao, Journal of molecular evolution, 2006
