*Methanobacterium (Kluyver and van Niel 1936)
*Methanobrevibacter (Balch and Wolfe 1981)
*Methanosphaera (Miller and Wolin 1985)
*Methanothermobacter (Wasserfallen et al. 2000)
*Methylosphaera (Bowman et al. 1998) (hu)
*Methanobacterium (Kluyver and van Niel 1936)
*Methanobrevibacter (Balch and Wolfe 1981)
*Methanosphaera (Miller and Wolin 1985)
*Methanothermobacter (Wasserfallen et al. 2000)
*Methylosphaera (Bowman et al. 1998) (hu)