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351 entries under creature topic. ×

2
Actinidia(noun, geohistory, eocene)
2
Adelotus(noun, geohistory, chattian)
2
Adeonellidae(noun, geohistory, eocene)
2
Adeonidae(noun, geohistory, eocene)
2
Aequornithes(noun, geohistory, paleocene)
2
Afroaves(noun, geohistory, paleocene)
2
Afrotheria(noun, geohistory, paleocene)
2
Aldrovanda(noun, geohistory, paleocene)
2
Alectis(noun, geohistory, eocene)
2
Alligatorinae(noun, geohistory, paleocene)
2
Alosa(noun, geohistory, eocene)
2
Amphipoda(noun, geohistory, eocene)
2
Amphistegina(noun, geohistory, eocene)
2
Ampullinopsis(noun, geohistory, paleocene)
2
Anatidae(noun, geohistory, rupelian)
2
Andrias(noun, geohistory, paleocene)
2
Anguillidae(noun, geohistory, paleocene)
2
Anomalure(noun, geohistory, eocene)
2
Anomaluromorpha(noun, geohistory, eocene)
2
Anseranatidae(noun, geohistory, eocene)
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APASmart Define. (1970). extant oligocene first appearance thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "extant oligocene first appearance thesaurus" https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 1970, extant oligocene first appearance thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related>.
MLASmart Define. "extant oligocene first appearance thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related>