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91 entries under paleocene topic. ×

2
Carpilioidea(noun, creature, geohistory)
2
Cassis(noun, creature, geohistory)
2
Chameleon(noun, creature, geohistory)
2
Cheloniidae(noun, creature, geohistory)
2
Cibicides(noun, creature, geohistory)
2
Cingulata(noun, creature, geohistory)
2
Clavulina(noun, creature, geohistory)
2
Corallus(noun, creature, geohistory)
2
Corydoras(noun, creature, geohistory)
2
Cryptobranchus(noun, creature, geohistory)
2
Cucurbitaceae(noun, creature, geohistory)
2
Cypriniformes(noun, creature, geohistory)
2
Enoplosus armatus(expression, creature, geohistory)
2
Euarchonta(noun, creature, geohistory)
2
Euarchontoglires(noun, creature, geohistory)
2
Extant Thanetian first appearance(expression, geohistory, appearance)
2
Fabaceae(noun, creature, geohistory)
2
Flatfish(noun, creature, geohistory)
2
Fungus-growing ants(expression, creature, geohistory)
2
Galliformes(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>