Classification of the Six Kingdoms of Life Underlined names are linked to pages with classification in lower categories or to pages with relevant photos

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Prokaryotes

Kingdom Animalia  (=Metazoa) - 34 phyla with about 1,300,000 known species (estimate incl. undescribed species: 10-200 million)

Multicellular animals.

Kingdom Plantae  (=Metaphyta)

Multicellular plants.

Kingdom Fungi  - about 72,000 known species

Fungi.

Kingdom Protista  - 17-18 phyla with about 80,000 known species

Protists.

Eukaryotes

Kingdom Eubacteria  (=Bacteria)

"True" bacteria (incl. cyanobacteria and spirochetes).

Kingdom Archaea  (=Archaebacteria)

Anaerobic or aerobic, largely methane-producing.

*Portions of the old "Kingdom Monera" are now included in the Eubacteria and the Archaea. Vira and subviral organisms are not included in this classification.

Based on: Brusca, R.C. & Brusca, G.J. 2003. Invertebrates. 2nd ed. Sinauer, Sunderland, Massachusetts. 936 pp.