title: Thermoplasmata
text: # 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 Thermoplasmata are thermophilic.
  
  ## Phylogeny
  
  The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI).
  
  | 16S rRNA based LTP_06_2022 | 53 marker proteins based GTDB 08-RS214 |
  | - | - |
  | Methanomassiliicoccales Methanomassiliicoccaceae Thermoplasmatales Thermoplasmataceae Thermogymnomonas Cuniculiplasmataceae Picrophilaceae Ferroplasmataceae | "Natronoplasmatales" "Natronoplasmataceae" (PWKY01) "Proteinoplasmatales" (SG8-5) "Gimiplasmatales" "Gimiplasmataceae" (UA10834) "Sysuiplasmatales" "Sysuiplasmataceae" Methanomassiliicoccales Methanomassiliicoccaceae "Methanomethylophilaceae" "Aciduliprofundales" "Aciduliprofundaceae" Thermoplasmatales Thermoplasmataceae |
  