Related how?

Biota (Life)
Prokaryotes (Prokaryota)
Archaea (Archaebacteria)
Euryarchaeota

Methanomicrobia (1051432)

Children (4 direct children, 160 direct and indirect children):

Methanocellales (tree size 5)

Methanomassiliicoccus (tree size 1)

Methanomicrobiales (tree size 76)

Methanosarcinales (tree size 74)