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120 entries under eocene topic. ×

6
Extant Eocene first appearance(expression, geohistory, period)
5
Bartonian first appearance(expression, geohistory, period)
5
Lutetian first appearance(expression, geohistory, period)
5
Priabonian first appearance(expression, geohistory, period)
5
Ypresian first appearance(expression, geohistory, period)
2
Acer dettermani(expression, creature, geohistory)
2
Acer ivanofense(expression, creature, geohistory)
2
Adapidae(noun, creature, geohistory)
2
Adapiformes(noun, creature, geohistory)
2
Adapinae(noun, creature, geohistory)
2
Afrotarsius(noun, creature, geohistory)
2
Ambulocetidae(noun, creature, geohistory)
2
Amynodontidae(noun, creature, geohistory)
2
Anchitheriinae(noun, creature, geohistory)
2
Ancylopoda(noun, creature, geohistory)
2
Anoplotheriidae(noun, creature, geohistory)
2
Anthracotheriidae(noun, creature, geohistory)
2
Anthracotherium(noun, creature, geohistory)
2
Archaeohyrax(noun, creature, geohistory)
2
Archaeopithecidae(noun, creature, geohistory)
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APASmart Define. (1970). paleocene first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/paleocene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "paleocene first appearance thesaurus" https://smartdefine.org/paleocene_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, paleocene first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/paleocene_first_appearance/thesaurus/related>.
MLASmart Define. "paleocene first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/paleocene_first_appearance/thesaurus/related>