Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Thermoplasmatales is an order of archaeans in the class Thermoplasmata. All are acidophiles, growing optimally at pH below 2. Picrophilus is currently the most acidophilic of all known organisms, being capable of growing at a 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 the Thermotoplasmata are thermophilic.
Oueriaghli, Nahid; Bejar, Victoria; Quesada, Emilia; Martinez-Checa, Fernando (2013). "Molecular Ecology Techniques Reveal Both Spatial and Temporal Variations in the Diversity of Archaeal Communities within the Athalassohaline Environment of Rambla Salada, Spain". Microbial Ecology. 66 (2): 297–311. doi:10.1007/s00248-013-0176-5. PMID23354292. S2CID18200481.
Huber, Harald; Stetter, Karl O. (2006). The Prokaryotes: A Handbook on the Biology of Bacteria. Vol. 3: Archaea. Bacteria: Firmicutes, Actinomycetes (Third ed.). Springer. pp. 101–112. doi:10.1007/0-387-30743-5_7. ISBN978-0-387-25493-7. LCCN91017256.
Reysenbach, A-L (2001). "Order I. Thermoplasmatales ord. nov.". In DR Boone; RW Castenholz (eds.). Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria (2nd ed.). New York: Springer Verlag. p. 169. ISBN978-0-387-98771-2.
Reysenbach, A-L (2001). "Class IV. Thermoplasmata class. nov.". In DR Boone; RW Castenholz (eds.). Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria (2nd ed.). New York: Springer Verlag. p. 169. ISBN978-0-387-98771-2.