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219 entries under appearance topic. ×

5
Anthracotherium(noun, creature, eocene)
5
Archaeohyracidae(noun, creature, paleocene)
5
Archaeohyrax(noun, creature, eocene)
5
Archaeopithecidae(noun, creature, eocene)
5
Archaeotherium(noun, creature, eocene)
5
Arctostylopida(noun, creature, paleocene)
5
Arsinoitheriidae(noun, creature, eocene)
5
Asiadapinae(noun, creature, eocene)
5
Asterostomatidae(noun, creature, eocene)
5
Astrapotheria(noun, creature, paleocene)
5
Astrapotheriidae(noun, creature, eocene)
5
Aturia(noun, creature, paleocene)
5
Azibiidae(noun, creature, eocene)
5
Barytherium(noun, creature, eocene)
5
Basilosaurinae(noun, creature, eocene)
5
Bear dog(expression, creature, eocene)
5
Bemalambdidae(noun, creature, paleocene)
5
Borhyaenidae(noun, creature, eocene)
5
Borophaginae(noun, creature, oligocene)
5
Bothriogenys(noun, creature, eocene)
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APASmart Define. (1970). paleogene first appearance thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/paleogene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "paleogene first appearance thesaurus" https://smartdefine.org/paleogene_first_appearance/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 1970, paleogene first appearance thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>.
MLASmart Define. "paleogene first appearance thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>