Sphingobacteria (phylum)

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FCB group
Bacteroides biacutis 01.jpg
Bacteroides spp.
Scientific classification
FCB group

Sphingobacteria Cavalier-Smith, 1987[1]

Sphingobacteria is a division (phylum), created by Cavalier-Smith, which contains the classes Chlorobea, Fibrobacteres, Bacteroidetes and Flavobacteria.[2]

It is however not followed by the larger scientific community. The group is commonly referred to as the "FCB group" with the rank of superphylum and the subdivisions are of the rank phylum and are referred to as:[3][4][5]

  • Chlorobi (Chlorobea in Cavalier-Smith megaclassification)
  • Bacteroidetes, which differs from Cavalier-Smith megaclassification as it is composed of the classes Bacteroidia (equivalent to Cavalier-Smith's Bacteroidetes), Cytophagia and Flavobacteria and Sphingobacteria
  • Fibrobacteres

An analogous situation is seen with the PVC group/Planctobacteria.


  1. ^ Cavalier-Smith, T. (1987). The origin of cells: a symbiosis between genes, catalysts and membranes. Cold Spring Harbor Symposium on Quantitative Biology 52, 805-24, [1], [2].
  2. ^ Cavalier-Smith T (2006). "Rooting the tree of life by transition analyses". Biol. Direct. 1: 19. doi:10.1186/1745-6150-1-19. PMC 1586193. PMID 16834776.
  3. ^ Krieg, N.R.; Ludwig, W.; Whitman, W.B.; Hedlund, B.P.; Paster, B.J.; Staley, J.T.; Ward, N.; Brown, D.; Parte, A. (November 24, 2010) [1984(Williams & Wilkins)]. George M. Garrity, ed. The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and Planctomycetes. Bergey's Manual of Systematic Bacteriology. 4 (2nd ed.). New York: Springer. p. 908. ISBN 978-0-387-95042-6. British Library no. GBA561951.
  4. ^ Gupta, R. S. (2004). "The Phylogeny and Signature Sequences Characteristics ofFibrobacteres,Chlorobi, andBacteroidetes". Critical Reviews in Microbiology. 30 (2): 123–143. doi:10.1080/10408410490435133. PMID 15239383.
  5. ^ Classification entry in LPSN [Euzéby, J.P. (1997). "List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet". Int J Syst Bacteriol. Microbiology Society. 47 (2): 590–2. doi:10.1099/00207713-47-2-590. ISSN 0020-7713. PMID 9103655. Retrieved 2019-02-23.]