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5 entries under appearence topic. ×

6
Extant Eocene first appearance(expression, eocene, period)
6
Lutetian first appearance(expression, eocene, period)
6
Bartonian first appearance(expression, eocene, period)
6
Priabonian first appearance(expression, eocene, period)
6
Ypresian first appearance(expression, eocene, period)
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APASmart Define. (1970). paleogene first appearance thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/paleogene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "paleogene first appearance thesaurus" https://smartdefine.org/paleogene_first_appearance/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 1970, paleogene first appearance thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>.
MLASmart Define. "paleogene first appearance thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/paleogene_first_appearance/thesaurus/related>