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28 entries under geohistory topic. ×

2
Afrotarsius(noun, animal, extinction)
2
Archaeohyrax(noun, animal, extinction)
2
Bennettitales(noun, animal, extinction)
2
Caedocyon(noun, animal, extinction)
2
Calamophylliopsis(noun, animal, extinction)
2
Cormocyon(noun, animal, extinction)
2
Cymatoceras(noun, animal, extinction)
2
Cymatoceratidae(noun, animal, extinction)
2
Eosimiidae(noun, animal, extinction)
2
Florissantia(noun, animal, extinction)
2
Groeberiidae(noun, animal, extinction)
2
Hercoglossidae(noun, animal, extinction)
2
Holosteus(noun, animal, extinction)
2
Hyporhina(noun, animal, extinction)
2
Leptauchenia(noun, animal, extinction)
2
Leptictida(noun, animal, extinction)
2
Miohippus(noun, animal, extinction)
2
Multituberculata(noun, animal, extinction)
2
Omomyidae(noun, animal, extinction)
2
Palaeolagus(noun, animal, extinction)
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APASmart Define. (1970). oligocene extinction thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/oligocene_extinction/thesaurus/narrower
ChicagoSmart Define. 1970. "oligocene extinction thesaurus" https://smartdefine.org/oligocene_extinction/thesaurus/narrower (accessed October 1, 2026).
HarvardSmart Define 1970, oligocene extinction thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/oligocene_extinction/thesaurus/narrower>.
MLASmart Define. "oligocene extinction thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/oligocene_extinction/thesaurus/narrower>