Bicosoecida

Bicosoecids
Cafeteria roenbergensis, a non-loricate bicosoecid
Scientific classification
Domain:	Eukaryota
(unranked):	SAR
Superphylum:	Heterokonta
Class:	Bikosea Cavalier-Smith 2013
Order:	Bicosoecida Honigberg et al., 1964, Zhukov, 1978, Karpov, 1998, 2000
Orders
Rictidia Rictida Bicosidia Borokiae Borokales Cyathobodoniae Anoecida Bicosoecida Pseudodendromonadida
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 van den Hoek et al., 1995 Bicosoecida Honigberg et al., 1964, Zhukov, 1978, Karpov, 1998, 2000

The bicosoecids, formally Bicosoecida (ICZN) or Bicosoecales/Bicoecea (ICBN), 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.

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 "bicosoecid" (or "bicoecid") in a narrower sense, only for Bicosoeca, aplying "bicoeceans" to Bicosoeca and related groups like Cafeteria.

With the advent of using molecular phylogenies to resolve relationships of many protists the original circumscription of bicosoecids has been greatly expanded upon to include other orders and the rank has changed from an order to a class.

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Wikipedia