Bacillus pseudofirmus is a facultative anaerobe bacterium.
[1] It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
In 2019, it was found in a hyperalkaline spring in Zambales (Philippines) a bacterial consortium of a strain of Bacillus pseudofirmus with Bacillus agaradhaerens that can biodegrade LDPE plastic.
[2] This species has been recently transferred into the genus Alkalihalobacillus.
[3] The correct nomenclature is Alkalihalobacillus pseudofirmus.