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211 entries under creature topic. ×

5
Anthracotherium(noun, appearance, eocene)
5
Archaeohyracidae(noun, appearance, paleocene)
5
Archaeohyrax(noun, appearance, eocene)
5
Archaeopithecidae(noun, appearance, eocene)
5
Archaeotherium(noun, appearance, eocene)
5
Arctostylopida(noun, appearance, paleocene)
5
Arsinoitheriidae(noun, appearance, eocene)
5
Asiadapinae(noun, appearance, eocene)
5
Asterostomatidae(noun, appearance, eocene)
5
Astrapotheria(noun, appearance, paleocene)
5
Astrapotheriidae(noun, appearance, eocene)
5
Aturia(noun, appearance, paleocene)
5
Azibiidae(noun, appearance, eocene)
5
Barytherium(noun, appearance, eocene)
5
Basilosaurinae(noun, appearance, eocene)
5
Bear dog(expression, appearance, eocene)
5
Bemalambdidae(noun, appearance, paleocene)
5
Borhyaenidae(noun, appearance, eocene)
5
Borophaginae(noun, appearance, oligocene)
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Bothriogenys(noun, appearance, eocene)
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APASmart Define. (1970). paleogene first appearance thesaurus. Retrieved September 29, 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 29, 2026).
HarvardSmart Define 1970, paleogene first appearance thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>.
MLASmart Define. "paleogene first appearance thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>