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28 entries under oligocene topic. ×

2
Afrotarsius(noun, geohistory, extinction)
2
Archaeohyrax(noun, geohistory, extinction)
2
Bennettitales(noun, geohistory, extinction)
2
Caedocyon(noun, geohistory, extinction)
2
Calamophylliopsis(noun, geohistory, extinction)
2
Cormocyon(noun, geohistory, extinction)
2
Cymatoceras(noun, geohistory, extinction)
2
Cymatoceratidae(noun, geohistory, extinction)
2
Eosimiidae(noun, geohistory, extinction)
2
Florissantia(noun, geohistory, extinction)
2
Groeberiidae(noun, geohistory, extinction)
2
Hercoglossidae(noun, geohistory, extinction)
2
Holosteus(noun, geohistory, extinction)
2
Hyporhina(noun, geohistory, extinction)
2
Leptauchenia(noun, geohistory, extinction)
2
Leptictida(noun, geohistory, extinction)
2
Miohippus(noun, geohistory, extinction)
2
Multituberculata(noun, geohistory, extinction)
2
Omomyidae(noun, geohistory, extinction)
2
Palaeolagus(noun, geohistory, extinction)
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APASmart Define. (1970). paleogene extinction thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/paleogene_extinction/thesaurus/related
ChicagoSmart Define. 1970. "paleogene extinction thesaurus" https://smartdefine.org/paleogene_extinction/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 1970, paleogene extinction thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/paleogene_extinction/thesaurus/related>.
MLASmart Define. "paleogene extinction thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/paleogene_extinction/thesaurus/related>