page_title: List of the Cenozoic life of South Dakota
section_title: A
hierarchical_section_title: List of the Cenozoic life of South Dakota / A
caption_attribution_description: Skeleton of Alligator prenasalis, a fossil gator
context_page_description: This list of the Cenozoic life of South Dakota contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of South Dakota and are between 66 million and 10,000 years of age.
context_section_description: †Adeloblarina
  †Adeloblarina berklandi – or unidentified comparable form
  †Adjidaumo
  †Adjidaumo lophatus
  †Adjidaumo minutus
  †Aelurodon
  †Aelurodon ferox
  †Aelurodon taxoides
  †Aepinacodon
  †Aepinacodon deflectus – type locality for species
   †Aepycamelus
  †Agnotocastor
  †Agnotocastor coloradensis
  †Agnotocastor praetereadens – type locality for species
  †Agriochoerus
  †Agriochoerus antiquus
  †Agriochoerus gaudryi – type locality for species
  †Alilepus – tentative report
  †Alismaphyllites
  †Alismaphyllites grandifolius
  †Allantodiopsis
  †Allantodiopsis erosa
  Alligator
   †Alligator prenasalis – type locality for species
  †Allomys
  †Allomys harkseni
  †Allomys storeri – type locality for species
  †Allophaiomys
  †Allophaiomys pliocaenicus
  †Alwoodia
  †Ambystoma
  †Ambystoma minshalli
  †Ambystoma tigrinum
   †Amebelodon
  †Ameiseophis
  †Ameiseophis robinsoni
  †Ampelopsis
  †Ampelopsis acerifolia
  †Amphechinus
  †Amphechinus horncloudi
  †Amphicaenopus
  †Amphicaenopus platycephalus – type locality for species
  †Amynodontopsis
  †Amynodontopsis bodei
  †Anchitherium
  †Anchitherium clarencei
  †Ansomys
  †Ansomys cyanotephrus – type locality for species
  Antilocapra
  †Antilocapra americana
  Apalone
  †Apalone leucopotamica
  †Aphelops
  †Aphelops megalodus
  †Apternodus
  †Apternodus mediaevus
  †Archaeocyon
  †Archaeocyon leptodus
  †Archaeocyon pavidus
  †Archaeohippus
  †Archaeohippus blackbergi – or unidentified comparable form
  †Archaeolagus
  †Archaeolagus macrocephalus – type locality for species
  †Archaeolagus primigenius – type locality for species
   †Archaeotherium
  †Archaeotherium lemleyi – type locality for species
  †Archaeotherium marshi – type locality for species
  †Archaeotherium mortoni
  †Archaeotherium trippensis – type locality for species
  †Arctodus
  †Arctodus simus
  †Arctonasua
  †Arretotherium
  †Arretotherium fricki
  †Arretotherium leptodus – type locality for species
  Azolla
  †Azolla schopfi – type locality for species
caption: Fossilized skeleton of the Oligocene Alligator prenasalis
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