Bigyra is a grouping of heterokont organisms. It includes

Bicosoecida 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. The cells ...

Blastocystis ''Blastocystis'' is a genus of single-celled heterokont parasites belonging to a group of organisms that are known as the Stramenopiles (also called Heterokonts) that includes algae, diatoms, and water molds. Blastocystis consists of several sp ...

and

Labyrinthulida 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 labyrin ...

. It has also been described as containing

Opalozoa Opalozoa is a subphylum of heterotrophic protists of the phylum Bigyra, and is the sister group to Sagenista. Opalozoans are non-photosynthetic heterokonts that are ancestrally phagotrophic but many times have evolved to be osmotrophic saprotrop ...

Bicoecia 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. The cells ar ...

, and

Sagenista 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 wer ...

Phylogeny

The cladogram below shows the internal relationships within Bigyra:

Classification

The modern taxonomy of Bigyra is as follows: *Phylum Bigyra **Subphylum

***Infraphylum

Placidozoa Placidozoa is a recently defined non-photosynthetic lineage of Heterokonts. Phylogeny Taxonomy Infraphylum Placidozoa Cavalier-Smith 2013 * Superclass Wobblata Cavalier-Smith 2006 stat. n. 2013 (paraphyletic) ** Class Placididea Moriya, Nakay ...

****Superclass

Wobblata Wobblata is a paraphyletic grouping of all placidozoans except Opalinata. It unites the classes Placididea, Nanomonadea and Opalomonadea. Description Members of this group are ancestrally aerobic phagotrophic biciliates. They have tubular mitoch ...

(

paraphyletic In taxonomy (general), taxonomy, a group is paraphyletic if it consists of the group's most recent common ancestor, last common ancestor and most of its descendants, excluding a few Monophyly, monophyletic subgroups. The group is said to be pa ...

) *****Class Placididea *****Class

Nanomonadea Nanomonadea is a class of biciliate phagotrophic, non-photosynthetic free-living opalozoans, coontaining the sole order Uniciliatida. This monophyletic group previously known as clade MAST-3 is characterized by a single hairless posterior cilium ...

*****Class Opalomonadea ****Superclass Opalinata *****Class Opalinea *****Class Blastocystea ***Infraphylum Bikosia ****Class Bikosea **Subphylum

***Class

Labyrinthulea 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 labyri ...

***Class

Eogyrea 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 wer ...

References

External links

* * SAR supergroup unranked clades {{heterokont-stub