• Harald Huber
  • Karl O. Stetter
Reference work entry


The order Thermoplasmatales (Reysenbach, 2001) is represented by facultatively anaerobic, thermoacidophilic, autotrophic or heterotrophic organisms that are unique among the Archaea both by their morphology and by their phylogenetic position. So far, the order harbors three families, each represented by one genus: the Thermoplasmaceae (genus Thermoplasma; Darland et al., 1970), the Picrophilaceae (genus Picrophilus; Schleper et al., 1995), and the recently described Ferroplasmaceae (genus Ferroplasma; Golyshina et al., 2000), formerly named Ferromonas metallovorans.

Thermoplasma spp. are devoid of a cell wall or envelope. For that reason, the genus Thermoplasma, which was for a long time (until 1995) the only member of the group, was first considered to be associated with the (bacterial) mycoplasmas (Darland et al., 1970; Masover and Hayflick, 1981). However, results of 16S rRNA sequence analyses revealed that Thermoplasma was a member of the archaeal domain (Woese and...


Meat Extract Acidithiobacillus Ferrooxidans Tetraether Lipid Coccoid Form Sole Energy Source 
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  • Harald Huber
  • Karl O. Stetter

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