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Gracilicutes

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Domain
  
Scientific name
  
Gracilicutes

Gracilicutes Gracilicutes 2

Similar
  
Tenericutes, Firmicutes, Mollicutes, Deinococcus–Thermus, Sphingobacteria

Gracilicutes top 6 facts


Gracilicutes (Latin: gracilis, slender, and cutis, skin, referring to the cell wall) is a controversial taxon in bacterial taxonomy.

Contents

Gracilicutes Gracilicutes 2

Traditionally gram staining results were most commonly used as a classification tool, consequently until the advent of molecular phylogeny, the Kingdom Monera (as the domains Bacteria and Archaea were known then) was divided into four phyla,

Gracilicutes httpsuploadwikimediaorgwikipediacommonsthu

  • Gracilicutes (gram-negative, it is split in many groups, but some authors stil use it in a narrower sense)
  • Firmacutes [sic] (gram-positive, subsequently corrected to Firmicutes, today it includes the Mollicutes but excludes the Actinobacteria)
  • Mollicutes (gram variable, posteriorly renamed as Tenericutes, e.g. Mycoplasma)
  • Mendosicutes (uneven gram stain, "methanogenic bacteria" now known as methanogens and classed as Archaea)

  • Gracilicutes Filerbol de GracilicutesPNG Wikimedia Commons

    This classification system was abandoned in favour of the three-domain system based on molecular phylogeny started by C. Woese.

    Gracilicutes Search

    This taxon was revived in 2006 by Cavalier-Smith as an infrakindgom containing the phyla Spirochaetae, Sphingobacteria, Planctobacteria, and Proteobacteria. However, this taxon is not generally accepted and the three-domain system is followed.

    It is a gram-negative clade that branched off from other bacteria just before the evolutionary loss of the outer membrane or capsule, and just after the evolution of flagella.

    Relationships

    The following graph shows Cavalier-Smith's version of the tree of life, indicating the status of Gracilicutes.

    References

    Gracilicutes Wikipedia


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