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380 entries under geohistory topic. ×

2
Alligator(noun, creature, oligocene)
2
Alligatorinae(noun, creature, paleocene)
2
Ameiurus(noun, creature, oligocene)
2
Ampullinopsis(noun, creature, paleocene)
2
Andrias(noun, creature, paleocene)
2
Anguillidae(noun, creature, paleocene)
2
Aplodontiidae(noun, creature, oligocene)
2
Apodiformes(noun, creature, paleocene)
2
Astraea(noun, creature, paleocene)
2
Atlantogenata(noun, creature, paleocene)
2
Australidelphia(noun, creature, paleocene)
2
Bathytoma(noun, creature, paleocene)
2
Boidae(noun, creature, paleocene)
2
Boinae(noun, creature, paleocene)
2
Bonefishes(noun, creature, paleocene)
2
Buccella(noun, creature, oligocene)
2
Budgerigar(noun, creature, paleocene)
2
Buteo(noun, creature, oligocene)
2
Caiman(noun, creature, paleocene)
2
Callichthyidae(noun, creature, paleocene)
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APASmart Define. (1970). extant paleogene first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/extant_paleogene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "extant paleogene first appearance thesaurus" https://smartdefine.org/extant_paleogene_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, extant paleogene first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/extant_paleogene_first_appearance/thesaurus/related>.
MLASmart Define. "extant paleogene first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/extant_paleogene_first_appearance/thesaurus/related>