170 entries under noun topic. ×

3
Acanthochitona(creature, appearance, eocene, geogistory)
3
Accipitridae(creature, geohistory, ypresian)
3
Accipitriformes(creature, geohistory, lutetian)
3
Aeluroidea(creature, appearance, eocene, geogistory)
3
Aequornithes(creature, geohistory, paleocene)
3
Afroaves(creature, geohistory, paleocene)
3
Afrotheria(creature, geohistory, paleocene)
3
Agroecomyrmecinae(creature, geohistory, lutetian)
3
Albatross(creature, appearance, eocene, geogistory)
3
Aldrovanda(creature, geohistory, paleocene)
3
Alligator(creature, appearance, eocene, geogistory)
3
Alligatorinae(creature, geohistory, paleocene)
3
Amblyoponinae(creature, geohistory, lutetian)
3
Ameiurus(creature, appearance, eocene, geogistory)
3
Ampullinopsis(creature, geohistory, paleocene)
3
Andrias(creature, geohistory, paleocene)
3
Anguillidae(creature, geohistory, paleocene)
3
Aplodontiidae(creature, appearance, eocene, geogistory)
3
Apodiformes(creature, geohistory, paleocene)
3
Astraea(creature, geohistory, paleocene)
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APASmart Define. (1970). extant eocene first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "extant eocene first appearance thesaurus" https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, extant eocene first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related>.
MLASmart Define. "extant eocene first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related>