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Scientific classification
Domain: Eukaryota
(unranked): SAR
Superphylum: Heterokonta
(unranked): Bigyra
Cavalier-Smith, 1997, 1998[1][2]

Bigyra is a heterokont grouping.[3]

It includes Bicosoecida, Blastocystis and Labyrinthulida.[3]

It has also been described as containing Opalozoa, Bicoecia, and Sagenista.[4]


  1. ^ Cavalier-Smith, T. (1997). Sagenista and Bigyra, two phyla of heterotrophic heterokont chromists. Archiv für Protistenkunde 148 (3): 253–267.
  2. ^ Cavalier-Smith, T. (1998). A revised six-kingdom system of life. Biol. Rev. 73.
  3. ^ a b Riisberg I, Orr RJ, Kluge R, et al. (May 2009). "Seven gene phylogeny of heterokonts". Protist. 160 (2): 191–204. doi:10.1016/j.protis.2008.11.004. PMID 19213601. 
  4. ^ Cavalier-Smith T, Chao EE (April 2006). "Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista)". J. Mol. Evol. 62 (4): 388–420. doi:10.1007/s00239-004-0353-8. PMID 16557340.