Thermoplasma is a genus of archaeans.

[1] It belongs to the class Thermoplasmata, which thrive in acidic and high-temperature environments.

Thermoplasma are facultative anaerobes and respire using sulfur and organic carbon.

They do not contain a cell wall but instead contain a unique membrane composed mainly of a tetraether lipoglycan containing atypical archaeal tetraether lipid attached to a glucose- and mannose-containing oligosaccharide.

This lipoglycan is presumably responsible for the acid and thermal stability of the Thermoplasma membrane.