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91 entries under paleocene topic. ×

2
Strisores(noun, creature, geohistory)
2
Struthionidae(noun, creature, geohistory)
2
Sulidae(noun, creature, geohistory)
2
Tarsiiformes(noun, creature, geohistory)
2
Tawny nurse shark(expression, creature, geohistory)
2
Triakis(noun, creature, geohistory)
2
Ungulate(noun, creature, geohistory)
2
Whale shark(expression, creature, geohistory)
2
Xenarthra(noun, creature, geohistory)
2
Zonaria(noun, creature, geohistory)
2
Zonitidae(noun, creature, geohistory)
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APASmart Define. (1970). extant oligocene first appearance thesaurus. Retrieved October 2, 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 October 2, 2026).
HarvardSmart Define 1970, extant oligocene first appearance thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related>.
MLASmart Define. "extant oligocene first appearance thesaurus" 1 January 1970. Web. 2 October 2026. <https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related>