Fig. 3
From: Genomic analysis of methanogenic archaea reveals a shift towards energy conservation
Sequenced methanogens cluster with other methanogens in their respective classes. The phylogenetic tree represents the evolutionary relationship of the sequenced methanogens (highlighted in color by Class) compared to other closely related sequenced archaea. As shown, methanogens in this study displayed a close evolutionary relationship to other methanogens within their genera. Within this tree, the Methanomicrobiales (represented by Mcor. parvum) are phylogenetically close to the Methanosarcinales (Msar. spelaei), but metabolically more similar to the Methanobacteriales (Msph. cuniculi and Mbac. bryantii). Bootstrap values are indicated for each node