Bicosoecida
Cafeteria roenbergensis, a non-loricate bicosoecid
Scientific classification
Domain:	Eukaryota
Clade:	Sar
Clade:	Stramenopiles
Phylum:	Bigyra
Subphylum:	Opalozoa
Order:	BicosoecidaGrassé, 1926[1]emend.Karpov in Karpov, Kersanach and Williams, 1998[2]
Synonyms
Bikoecida Stein, 1878 Bicoecinae Grassé, 1926[3] Bicoecidea Grassé & Deflandre in Grassé, 1952[4] Bicosoecales Bourrelly, 1968, 1981 Bicoecales Kristiansen, 1972[5] Bicosoecophyceae Casper, 1974, Loeblich III & Loeblich 1979[6] Bicosoecea Cavalier-Smith, 1986 Bicoecia Cavalier-Smith, 1989 Bicoecea Cavalier-Smith, 1993 Bicocoecida van den Hoek et al., 1995 Bicosoecida Honigberg et al., 1964, Zhukov, 1978, Karpov, 1998, 2000

Bicosoecida (ICZN) or Bicosoecales/Bicoecea (ICBN) is an order, a small group of unicellular flagellates, included among the stramenopiles. Informally known as bicosoecids, they are free-living cells, with no chloroplasts, and in some genera are encased in a lorica.

The name of the type genusBicosoeca described by James-Clark in 1866 is derived from Greek roots (bikos, vase, bowl, plus oekein, inhabit). The philologically preferable compound would be Bicoeca, as "corrected" by Stein in 1878 and followed by most subsequent authors. However, according to the ICBN and ICZN, the original spelling of the name cannot be considered incorrect and it must be used in its original form.

The group was formerly considered to be related to the Chrysophyceae.^[7]

Some authors use the vernacular term "bicosoecid" (or "bicoecid") in a narrower sense, only for Bicosoeca, applying "bicoeceans" to Bicosoeca and related groups like Cafeteria.^[8]

• Hibberd, D. J. (1986). Ultrastructure of the Chrysophyceae. Colorless forms. p. 29-30 In: Chrysophytes: Aspects and Problems. Kristiansen, J. and R.A. Andersen [Eds.]. Cambridge University Press, Cambridge.

• Data related to Bicosoecida at Wikispecies

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