In the history of the Linnaean classification system, many taxa have become defunct.
| Taxon | Classification(s) used | Contents |
|---|---|---|
| Order Agriae | Linnaeus (1748) | Anteaters and pangolins |
| Order Anthropomorpha | Linnaeus (1740, 1748) | 1740: Primates, anteaters, and sloths 1748: Primates and sloths |
| Order Belluae | Linnaeus (1758, 1766) | 1758: Horses and hippopotamuses 1766: as above plus pigs, and rhinoceroses |
| Order Bestiae | Linnaeus (1758) | Pigs, armadillos, hedgehogs, moles, shrews, and opossums |
| Kingdom Bionta | Walton (1930) | |
| Order Bruta | Linnaeus (1758, 1766) | 1758: Elephants, manatees, sloths, anteaters, pangolins 1766: as above plus armadillos |
| Suborder Gravigrada | ||
| Order Insectivora | Several | Hedgehog, shrews, moles, tenrecs, golden moles, solenodons, and sometimes elephant-shrews, treeshrews, and colugos |
| Order Jumenta | Linnaeus (1740, 1748) | 1740: Shrews, horses, elephants, hippopotamuses, and pigs
1748: as above plus rhinoceroses |
| Order Lipotyphla | ||
| Order and/or Suborder Pachydermata | Perissodactylans, elephants, hippopotamuses, peccaries and pigs | |
| Order Quaternates | Blainville (1839) | Gravigrada, Pachydermata and Ruminantia |
| Order Secundates | Blainville (1839) | Chiroptera, Insectivora and Carnivora |
| Genus Simia | Apes (but not humans) and monkeys | |
| Order Tertiates | Blainville (1839) | Glires |
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—Herman Melville (1819–1891)