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219 entries under appearance topic. ×

4
Prolimnocyon(noun, creature, paleocene)
4
Prorastomidae(noun, creature, eocene)
4
Proteopithecidae(noun, creature, eocene)
4
Protocetidae(noun, creature, eocene)
4
Psephophorus(noun, creature, oligocene)
4
Pyrocyon(noun, creature, eocene)
4
Pyrotheria(noun, creature, paleocene)
4
Raoellidae(noun, creature, eocene)
4
Remingtonocetidae(noun, creature, eocene)
4
Rhyssoplax(noun, creature, oligocene)
4
Rupelian first appearance(expression, period, oligocene)
4
Sarkastodon(noun, creature, eocene)
4
Sebecidae(noun, creature, paleocene)
4
Selandian first appearance(expression, period, paleocene)
4
Simimyidae(noun, creature, eocene)
4
Sinopa(noun, creature, eocene)
4
Sivaladapidae(noun, creature, eocene)
4
Sophiornithidae(noun, creature, paleocene)
4
Sparassodonta(noun, creature, paleocene)
4
Spathorhynchus(noun, creature, eocene)
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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>