Need high sodium chloride concentrations. Neutrophylic or alkalophilic. Mesophilic or slightly thermophilic. Pleomorphic cells, lack cell wall. Thermoacidophilic and chemoorganotrophic.
Plasma membrane contains mannose-rich glycoprotein and a lipoglycan.
Gram-negative rods, filaments, or cocci. Strict anaerobes, may also be aerobic or facultative. Acidophilic or neutrophilic, autotrophic ro heterotrophic. Most metabolize sulphur. S O reduced to H 2 S anaerobically.