the root (no rank)
Archaea (domain)
Euryarchaeota (phylum)
Methanobacteriales (order)
Methanobacteriaceae (family)
[hide inferior taxa]
Methanobacteriaceae archaeon (species)
Methanobacterium (genus)
Methanobrevibacter (genus)
Methanopyrus kandleri (species)
Methanothermobacter wolfeii (species)
uncultured Methanobacteriaceae archaeon (species)