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271 entries under geohistory topic. ×

1
Eporeodon(noun, creature, chattian)
1
Escavadodontidae(noun, creature, paleocene)
1
Eurymylidae(noun, creature, paleocene)
1
Eutypomyidae(noun, creature, eocene)
1
Euzaphlegidae(noun, creature, paleocene)
1
Fabiania(noun, creature, paleocene)
1
Ficopsis(noun, creature, paleocene)
1
Florissantia(noun, creature, eocene)
1
Formiciinae(noun, creature, eocene)
1
Galecyon(noun, creature, eocene)
1
Gastornis(noun, creature, paleocene)
1
Gentilicamelus(noun, creature, rupelian)
1
Gigantostrea(noun, creature, eocene)
1
Gobiomyidae(noun, creature, eocene)
1
Ground sloth(expression, creature, eocene)
1
Gryposuchinae(noun, creature, chattian)
1
Hapalodectidae(noun, creature, paleocene)
1
Hegetotheriidae(noun, creature, eocene)
1
Heliscomyidae(noun, creature, eocene)
1
Hemicyoninae(noun, creature, chattian)
For more, visit Oligocene_first_appearance on Power Thesaurus
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APASmart Define. (1970). oligocene first appearance thesaurus. Retrieved October 2, 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 2, 2026).
HarvardSmart Define 1970, oligocene first appearance thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/oligocene_first_appearance/thesaurus/related>.
MLASmart Define. "oligocene first appearance thesaurus" 1 January 1970. Web. 2 October 2026. <https://smartdefine.org/oligocene_first_appearance/thesaurus/related>