Halanaerobium acetethylicum
Halanaerobium alcaliphilum
Halanaerobium congolense
Halanaerobium fermentans
Halanaerobium kushneri
Halanaerobium lacusrosei
Halanaerobium praevalens
Halanaerobium saccharolyticum
(tree size 2)
Halanaerobium salsuginis
Halanaerobium hydrogenoformans
Halanaerobium hydrogeninformans
Halanaerobium sehlinense