58 entries under appearance topic. ×

6
Extant Chattian first appearance(expression, eocene, geogistory, period)
6
Extant Oligocene first appearance(expression, geohistory, period)
6
Extant Paleocene first appearance(expression, geohistory, period, paleogene)
6
Extant Rupelian first appearance(expression, eocene, geogistory, period)
6
eocene first appearance(expression, geohistory, period)
3
Acanthochitona(noun, creature, eocene, geogistory)
3
Aeluroidea(noun, creature, eocene, geogistory)
3
Albatross(noun, creature, eocene, geogistory)
3
Alligator(noun, creature, eocene, geogistory)
3
Ameiurus(noun, creature, eocene, geogistory)
3
Aplodontiidae(noun, creature, eocene, geogistory)
3
Buccella(noun, creature, eocene, geogistory)
3
Buteo(noun, creature, eocene, geogistory)
3
Callochiton(noun, creature, eocene, geogistory)
3
Certhioidea(noun, creature, eocene, geogistory)
3
Chaetopleura(noun, creature, eocene, geogistory)
3
Chamaesipho(noun, creature, eocene, geogistory)
3
Colpophyllia(noun, creature, eocene, geogistory)
3
Colubridae(noun, creature, eocene, geogistory)
3
Cottidae(noun, creature, eocene, geogistory)
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APASmart Define. (1970). extant eocene first appearance thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "extant eocene first appearance thesaurus" https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related (accessed September 29, 2026).
HarvardSmart Define 1970, extant eocene first appearance thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related>.
MLASmart Define. "extant eocene first appearance thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/extant_eocene_first_appearance/thesaurus/related>