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201 entries under noun topic. ×

4
Hanleya(creature, appearance, oligocene)
4
Hapalodectidae(creature, appearance, paleocene)
4
Hegetotheriidae(creature, appearance, eocene)
4
Heliscomyidae(creature, appearance, eocene)
4
Henricosborniidae(creature, appearance, paleocene)
4
Hesperocyoninae(creature, appearance, eocene)
4
Hoanghoniinae(creature, appearance, eocene)
4
Homalodotheriidae(creature, appearance, eocene)
4
Horusornithidae(creature, appearance, eocene)
4
Hyaenodon(creature, appearance, eocene)
4
Hyaenodontidae(creature, appearance, paleocene)
4
Hypertragulidae(creature, appearance, eocene)
4
Hypertragulus(creature, appearance, eocene)
4
Hyporhina(creature, appearance, eocene)
4
Hyracodontidae(creature, appearance, eocene)
4
Indricotheriinae(creature, appearance, eocene)
4
Interatheriidae(creature, appearance, paleocene)
4
Ischnochiton(creature, appearance, eocene)
4
Isotemnidae(creature, appearance, paleocene)
4
Kentriodontidae(creature, appearance, oligocene)
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APASmart Define. (1970). paleogene first appearance thesaurus. Retrieved October 1, 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 October 1, 2026).
HarvardSmart Define 1970, paleogene first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>.
MLASmart Define. "paleogene first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>