The PEDIGREE of
Genus Methanobrevibacter (human gut archaeon)

 
     aka Methanobrevibacter smithii; (the dominant SYMBIOTIC archaeon in the human gut; by consuming end products of bacterial fermentation helps human digest complex sugars; contributes to flatulence)
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/-- Earth of Cryptic Era (Hadean Eon)   +====> [ 33]
/-- Earth of Basin Groups Era (Hadean Eon)
/-- Earth of Nectarian Era (Hadean Eon)
/-- Earth of Lower Imbrian Era (Hadean Eon)
/-- Earth of Eoarchean Era (Archean Eon)
/-- Non-reproducing Precursor Organism
/-- Earliest life (Based on Peptide Nucleic Acid)
| \ / or: polyamide nucleic acid
|  | / or: glycol nucleic acid or: threose nucleic acid
/  \-- Montmorillonite-based Vesicles
/-- Earlier life (Based on RNA)  (3850+ M BC)
/   / (skip this generation?)
/-- Earlier Life (Based on RNA and Protein)
/-- Last Universal Ancestor of Present Life
| \ / OR: Last Universal Common Ancestor (LUCA)   +====> [ 9]
| | /-- Alkaline hydrothermal vents
/  \-- Tiny cavities in iron sulphide rocks
/-- Domain of Archaeota
/   / OR: prob. not (NN), a peculiar Symbiote   +====> [ 51]
/-- Phylum Euryarchaeota
/-- Class Methanobacteria
/-- Order Methanobacteriales
/-- Family Methanobacteriaceae
/  
- Genus Methanobrevibacter (human gut archaeon)
 

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