In the history of the Linnaean classification system, many taxa (e.g. species, genera, families, and higher taxonomic ranks) have become defunct or obsolete, and are no longer used.
| Taxon | Classification(s) used | Contents | |
|---|---|---|---|
| Class Vermes | Linnaeus | Worms | |
| Order Agriae | Linnaeus (1748)[2] | Anteaters and pangolins | |
| Order Anthropomorpha | Linnaeus (1740,[3] 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 | |
| Order Bruta | Linnaeus (1758,[4] 1766)[5] | 1758: Elephants, manatees, sloths, anteaters, pangolins 1766: as above plus armadillos | |
| Suborder Gravigrada | |||
| Several | Hedgehog, shrews, moles, tenrecs, golden moles, otter shrews, solenodons, and sometimes elephant-shrews, treeshrews, and colugos | ||
| Order Jumenta | Linnaeus (1740, 1748) | 1740: Shrews, horses, elephants, hippopotamuses, and pigs1748: as above plus rhinoceroses | |
| Order Lipotyphla | |||
| Order and/or Suborder Pachydermata | Perissodactyls, elephants, hippopotamuses, peccaries, pigs, and sometimes camels | ||
| Blainville (1839)[6] | Gravigrada, Pachydermata and Ruminantia | ||
| Blainville (1839) | Chiroptera, Insectivora and Carnivora | ||
| Blainville (1839) | Glires | ||
| Superorder Archonta | Primates, Bats, Colugos, Treeshrews, and sometimes Elephant shrews | ||
| Genus Simia | Apes (but not humans) and monkeys | ||
| Genus Tylognathus | Heckel | A variety of freshwater ray finned fish | |
| Genus Brochis | Cope | Three Catfish in the family Callichthyidae |