Synonyms|1Antonyms|0|Broader|3Narrower|25Related|147

28 entries under oligocene topic. ×

2
Palaeotheriidae(noun, geohistory, extinction)
2
Palimphyes(noun, geohistory, extinction)
2
Pantolestidae(noun, geohistory, extinction)
2
Parapithecidae(noun, geohistory, extinction)
2
Parapithecoidea(noun, geohistory, extinction)
2
Peltosaurus(noun, geohistory, extinction)
2
Proteopithecidae(noun, geohistory, extinction)
2
Pyrotheria(noun, geohistory, extinction)
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APASmart Define. (1970). cretaceous-paleogene boundary thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/cretaceous-paleogene_boundary/thesaurus/related
ChicagoSmart Define. 1970. "cretaceous-paleogene boundary thesaurus" https://smartdefine.org/cretaceous-paleogene_boundary/thesaurus/related (accessed October 2, 2026).
HarvardSmart Define 1970, cretaceous-paleogene boundary thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/cretaceous-paleogene_boundary/thesaurus/related>.
MLASmart Define. "cretaceous-paleogene boundary thesaurus" 1 January 1970. Web. 2 October 2026. <https://smartdefine.org/cretaceous-paleogene_boundary/thesaurus/related>