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  2. Kingdom (biology) - Wikipedia

    en.wikipedia.org/wiki/Kingdom_(biology)

    The classification of living things into animals and plants is an ancient one. Aristotle (384–322 BC) classified animal species in his History of Animals, while his pupil Theophrastus (c. 371 –c. 287 BC) wrote a parallel work, the Historia Plantarum, on plants. [7]

  3. Taxonomic rank - Wikipedia

    en.wikipedia.org/wiki/Taxonomic_rank

    In his landmark publications, such as the Systema Naturae, Carl Linnaeus used a ranking scale limited to kingdom, class, order, genus, species, and one rank below species. Today, the nomenclature is regulated by the nomenclature codes. There are seven main taxonomic ranks: kingdom, phylum or division, class, order, family, genus, and species.

  4. Cavalier-Smith's system of classification - Wikipedia

    en.wikipedia.org/wiki/Cavalier-Smith's_system_of...

    [10] [11] The taxa "animal kingdom" (or kingdom Animalia) and "plant kingdom" (or kingdom Plantae) remain in use by some modern evolutionary biologists. The initial targets of Cavalier-Smith's classification, the protozoa were classified as members of the animal kingdom, [12] and many algae were regarded as part of the plant kingdom. With ...

  5. Template:Full biological kingdom classification - Wikipedia

    en.wikipedia.org/wiki/Template:Full_biological...

    Template: Full biological kingdom classification. ... 2 kingdoms 3 kingdoms — 4 kingdoms: 5 kingdoms: 6 kingdoms — 8 kingdoms: 6 kingdoms: 7 kingdoms — Protista:

  6. Taxonomy (biology) - Wikipedia

    en.wikipedia.org/wiki/Taxonomy_(biology)

    His 2004 classification treated the archaeobacteria as part of a subkingdom of the kingdom Bacteria, i.e., he rejected the three-domain system entirely. [72] Stefan Luketa in 2012 proposed a five "dominion" system, adding Prionobiota (acellular and without nucleic acid) and Virusobiota (acellular but with nucleic acid) to the traditional three ...

  7. Template:Biological kingdom classification - Wikipedia

    en.wikipedia.org/wiki/Template:Biological...

    Template: Biological kingdom classification. ... 1998, [7] 2015 [8] 2 kingdoms 3 kingdoms 2 empires: 4 kingdoms: 5 kingdoms 3 domains: 2 empires, 6/7 kingdoms (not ...

  8. Two-empire system - Wikipedia

    en.wikipedia.org/wiki/Two-empire_system

    Phylogenetic and symbiogenetic tree of living organisms, showing the origins of eukaryotes and prokaryotes. The two-empire system (two-superkingdom system) was the top-level biological classification system in general use from the early 20th century until the establishment of the three-domain system (which itself is currently being challenged by the two-domain system).

  9. Thomas Cavalier-Smith - Wikipedia

    en.wikipedia.org/wiki/Thomas_Cavalier-Smith

    Cavalier-Smith's first major classification system was the division of all organisms into eight kingdoms. In 1981, he proposed that by completely revising Robert Whittaker's Five Kingdom system, there could be eight kingdoms: Bacteria, Eufungi, Ciliofungi, Animalia, Biliphyta, Viridiplantae, Cryptophyta, and Euglenozoa. [18]