Bicoecida

Bicoecida
Scientific classification
Domain: Eukaryota
Clade: Sar
Clade: Stramenopiles
Phylum: Bigyra
Class: Bikosea
Superorder: Cyathobodoniae
Order: Bicoecida
Grassé, 1926
Families
  • Bicosoecidae
  • Labromonadidae
Synonyms
  • Bikoecida Stein, 1878
  • Bicoecinae Grassé, 1926
  • Bicoecidea Grassé & Deflandre in Grassé, 1952
  • Bicosoecales Bourrelly, 1968, 1981
  • Bicoecales Kristiansen, 1972
  • Bicosoecophyceae Casper, 1974, Loeblich III & Loeblich 1979
  • Bicosoecea Cavalier-Smith, 1986
  • Bicoecia Cavalier-Smith, 1989
  • Bicoecea Cavalier-Smith, 1993
  • Bicocoecida Grassé, 1926 emend. Karpov, 1998 Honigberg et al., 1964, Zhukov, 1978, Karpov, 1998, 2000
  • Bicocoecida van den Hoek et al., 1995
  • Bicosoecida Honigberg et al., 1964, Zhukov, 1978, Karpov, 1998, 2000

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

The name of the type genus Bicosoeca 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.

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

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