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91 entries under paleocene topic. ×

2
Ornithorhynchidae(noun, creature, geohistory)
2
Owl(noun, creature, geohistory)
2
Pacific giant salamander(expression, creature, geohistory)
2
Paenungulata(noun, creature, geohistory)
2
Pangolin(noun, creature, geohistory)
2
Penguin(noun, creature, geohistory)
2
Phidoloporidae(noun, creature, geohistory)
2
Pilosa(noun, creature, geohistory)
2
Pinnotheridae(noun, creature, geohistory)
2
Placentalia(noun, creature, geohistory)
2
Podocnemididae(noun, creature, geohistory)
2
Polinices(noun, creature, geohistory)
2
Proboscidea(noun, creature, geohistory)
2
Proxiuber(noun, creature, geohistory)
2
Rhineuridae(noun, creature, geohistory)
2
Sand dollar(expression, creature, geohistory)
2
Scaphella(noun, creature, geohistory)
2
Schizaster(noun, creature, geohistory)
2
Sea butterfly(expression, creature, geohistory)
2
Slender-snouted crocodile(expression, creature, geohistory)
For more, visit Extant_oligocene_first_appearance on Power Thesaurus
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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>