Thermoplasmata
In taxonomy, the Thermoplasmata are a class of the Euryarchaeota.
All are acidophiles, growing optimally at pH below 2. Picrophilus is currently the most acidophilic of all known organisms growing at a minimum pH of 0.06. Many of these organisms do not contain a cell wall, although this is not true in the case of Picrophilus. Most members of Thermotoplasmata are thermophilic.Phylogeny
The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature and National Center for Biotechnology Information
and the phylogeny is based on 16S rRNA-based LTP release 121 by 'The All-Species Living Tree' Project.
Notes:
♠ Strains found at the National Center for Biotechnology Information but not listed in the List of Prokaryotic names with Standing in Nomenclature LPSNScientific journals