Methanococcus maripaludis
Methanococcus aeolicus
Methanococcus vannielii
Methanococcus voltae
Methanococcus deltae
Methanococcus fervens
Methanococcus frisius
Methanococcus halophilus
Methanococcus igneus
Methanococcus infernus
Methanococcus jannaschii
Methanococcus mazei
Methanococcus thermolithotrophicus
Methanococcus vulcanius