List of obsolete taxa
# List of obsolete taxa

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.

## Kingdoms

| Taxon | Classification(s) used | Contents |
| - | - | - |
| Kingdom Bionta | Walton (1930) | |

## Animals

| Taxon | Classification(s) used | Contents |
| - | - | - |
| Class Vermes | Linnaeus | Worms |
| 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 |
| 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, otter shrews, 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 | | Perissodactyls, elephants, hippopotamuses, peccaries, pigs, and sometimes camels |
| Order Quaternates | Blainville (1839) | Gravigrada, Pachydermata and Ruminantia |
| Order Secundates | Blainville (1839) | Chiroptera, Insectivora and Carnivora |
| Order Tertiates | 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 |

## Protists

| Taxon | Classification(s) used | Contents |
| - | - | - |
| Phylum Sarcodina | | Actinopoda [fr] Rhizopoda Proteomyxa |
