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168 entries under eocene topic. ×

1
Macginitiea(noun, creature, geohistory)
1
Machaeroides(noun, creature, geohistory)
1
Macraucheniidae(noun, creature, geohistory)
1
Megabat(noun, creature, geogistory)
1
Mercenaria(noun, creature, geogistory)
1
Merycoidodontoidea(noun, creature, geohistory)
1
Mesonyx(noun, creature, geohistory)
1
Mesotheriidae(noun, creature, geohistory)
1
Metacarcinus(noun, creature, geogistory)
1
Miohippus(noun, creature, geohistory)
1
Mongoose(noun, creature, geogistory)
1
Muscicapoidea(noun, creature, geogistory)
1
Nanotragulus(noun, creature, geohistory)
1
Nephrops(noun, creature, geogistory)
1
Notharctidae(noun, creature, geohistory)
1
Notharctinae(noun, creature, geohistory)
1
Notohippidae(noun, creature, geohistory)
1
Notoplax(noun, creature, geogistory)
1
Notostylopidae(noun, creature, geohistory)
1
Oligopithecidae(noun, creature, geohistory)
For more, visit Oligocene_first_appearance on Power Thesaurus
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APASmart Define. (1970). oligocene first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/oligocene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "oligocene first appearance thesaurus" https://smartdefine.org/oligocene_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, oligocene first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/oligocene_first_appearance/thesaurus/related>.
MLASmart Define. "oligocene first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/oligocene_first_appearance/thesaurus/related>