In taxonomy, the Thermoplasmata are a class of the Euryarchaeota.

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.

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[2] and National Center for Biotechnology Information (NCBI).

[1] Methanomassiliicoccaceae Thermoplasmataceae Thermogymnomonas Cuniculiplasmataceae Picrophilaceae Ferroplasmataceae "Proteinoplasmatales" (SG8-5) "Yaplasmatales" [RBG-16-68-12] "Gimiplasmataceae" (UA10834) "Sysuiplasmataceae" Methanomassiliicoccaceae Methanomethylophilaceae "Halarchaeoplasmataceae" (PWKY01) "Lutacidiplasmataceae" (GCA_022750295) "Aciduliprofundaceae" Thermoplasmataceae This Euryarchaeota-related article is a stub.