Archaea

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Phylum Crenarchaeota

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Phylum Euryarchaeota

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    Halobacteria

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    Methanobacteria

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    Methanococci

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    Methanopyri

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    Archaeoglobi

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    Thermoplasmata

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    Thermococci

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Phylum Korarchaeota

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Phylum Nanoarchaeota

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The Archaea are a major group of prokaryotes. Their classification among living things was difficult because they are similar to bacteria in some respects but similar to eukaryotes in others.

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Prokaryote: Prokaryotes (from Old Greek pro- before + karyon nut, referring to the cell nucleus, + suffix -otos, pl. -otes; also spelled "procaryotes") are organisms without a cell nucleus (= karyon), or indeed any other membrane-bound organelles, in most cases unicellular (in rare cases, multicellular). This ...

Eukaryotes: redirect Eukaryote...