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LUCA - The Most Recent Universal Common Ancestor

Linnaean Taxonomy

Phylogeny and hypothetical timeline (not to scale)

Life

Domain: Eubacteria

Domain: Archaea

Domain: Eukarya

ref. Woese et al 1990

Hadean  Archean     Proterozoic        Phanerozoic  
Origin of
Life on Earth 
     `--LUCA
        |--Eubacteria -----------------------------
        `--Ancestral Neomura
           |--Archaea  ----------------------------
           `-----------Eukarya  -------------------

(note: Neomura = Archaea if the latter is paraphyletic (i.e. if it includes ancestors to Eukarya)

LUCA and related topics: Origin of Life | Looking for LUCA Without a Map | Lateral gene transfer | References | Links

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