| paleocene first appearance(noun, creature, geohistory, paleocene) | |
| danian first appearance(noun, creature, geohistory, paleocene) | |
| extant eocene first appearance(noun, creature, geohistory, paleocene) | |
| extant oligocene first appearance(noun, creature, geohistory, paleocene) | |
| extant paleogene first appearance(noun, creature, geohistory, paleocene) | |
| selandian first appearance(noun, creature, geohistory, paleocene) | |
| thanetian first appearance(noun, creature, geohistory, paleocene) |
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| APA | Smart Define. (-0001). astraea thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/astraea/thesaurus/related |
| Chicago | Smart Define. -0001. "astraea thesaurus" https://smartdefine.org/astraea/thesaurus/related (accessed September 27, 2026). |
| Harvard | Smart Define -0001, astraea thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/astraea/thesaurus/related>. |
| MLA | Smart Define. "astraea thesaurus" 30 November -0001. Web. 27 September 2026. <https://smartdefine.org/astraea/thesaurus/related> |