1
Dichobunidae(noun, animal, geohistory, appearance)
1
Diplocynodontinae(noun, animal, geohistory, appearance)
1
Dolichoderus vectensis(expression, animal, geohistory, appearance)
1
Echinopedinidae(noun, animal, geohistory, appearance)
1
Entelodont(noun, animal, geohistory, appearance)
1
Eomyidae(noun, animal, geohistory, appearance)
1
Eosimiidae(noun, animal, geohistory, appearance)
1
Epoicotheriidae(noun, animal, geohistory, appearance)
1
Eutypomyidae(noun, animal, geohistory, appearance)
1
Extant Eocene first appearance(expression, appearance, period, geochronology)
1
Florentiamyidae(noun, animal, geohistory, appearance)
1
Florissantia(noun, animal, geohistory, appearance)
1
Formiciinae(noun, animal, geohistory, appearance)
1
Galecyon(noun, animal, geohistory, appearance)
1
Gigantostrea(noun, animal, geohistory, appearance)
1
Gobiomyidae(noun, animal, geohistory, appearance)
1
Ground sloth(expression, animal, geohistory, appearance)
1
Hegetotheriidae(noun, animal, geohistory, appearance)
1
Heliscomyidae(noun, animal, geohistory, appearance)
1
Hesperocyoninae(noun, animal, geohistory, appearance)
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APASmart Define. (1970). eocene first appearance thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/eocene_first_appearance/thesaurus/narrower
ChicagoSmart Define. 1970. "eocene first appearance thesaurus" https://smartdefine.org/eocene_first_appearance/thesaurus/narrower (accessed September 26, 2026).
HarvardSmart Define 1970, eocene first appearance thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/eocene_first_appearance/thesaurus/narrower>.
MLASmart Define. "eocene first appearance thesaurus" 1 January 1970. Web. 26 September 2026. <https://smartdefine.org/eocene_first_appearance/thesaurus/narrower>