26 entries under oligocene topic. ×

9
Smooth-hound(noun, creature, geohistory, ypresian)
9
Speocarcinus(noun, creature, geohistory, ypresian)
9
Tapir(noun, creature, geohistory, ypresian)
9
Threskiornithidae(noun, creature, geohistory, ypresian)
9
Trogon(noun, creature, geohistory, ypresian)
7
Viverridae(noun, creature, geohistory, ypresian)
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APASmart Define. (2013). cetacea thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/cetacea/thesaurus/related
ChicagoSmart Define. 2013. "cetacea thesaurus" https://smartdefine.org/cetacea/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 2013, cetacea thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/cetacea/thesaurus/related>.
MLASmart Define. "cetacea thesaurus" 19 May 2013. Web. 30 September 2026. <https://smartdefine.org/cetacea/thesaurus/related>