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211 entries under creature topic. ×

4
Hyporhina(noun, appearance, eocene)
4
Hyracodontidae(noun, appearance, eocene)
4
Indricotheriinae(noun, appearance, eocene)
4
Interatheriidae(noun, appearance, paleocene)
4
Ischnochiton(noun, appearance, eocene)
4
Isotemnidae(noun, appearance, paleocene)
4
Kentriodontidae(noun, appearance, oligocene)
4
Lazarussuchus(noun, appearance, paleocene)
4
Leontiniidae(noun, appearance, eocene)
4
Lepidopleurus(noun, appearance, paleocene)
4
Leptomerycinae(noun, appearance, eocene)
4
Leptomeryx(noun, appearance, eocene)
4
Limnocyon(noun, appearance, eocene)
4
Litopterna(noun, appearance, paleocene)
4
Lobocarcinus(noun, appearance, eocene)
4
Macginitiea(noun, appearance, eocene)
4
Machaeroides(noun, appearance, eocene)
4
Macraucheniidae(noun, appearance, eocene)
4
Mammacyon(noun, appearance, oligocene)
4
Merycochoerus(noun, appearance, oligocene)
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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>