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10 entries under expression topic. ×

3
Extant Thanetian first appearance(appearance, period, geochronology)
2
Enoplosus armatus(animal, geohistory, appearance)
2
Fungus-growing ants(animal, geohistory, appearance)
2
Nebrius ferrugineus(animal, geohistory, appearance)
2
Pacific giant salamander(animal, geohistory, appearance)
2
Sand dollar(animal, geohistory, appearance)
2
Sea butterfly(animal, geohistory, appearance)
2
Slender-snouted crocodile(animal, geohistory, appearance)
2
Tawny nurse shark(animal, geohistory, appearance)
2
Whale shark(animal, geohistory, appearance)
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APASmart Define. (1970). extant paleocene first appearance thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/extant_paleocene_first_appearance/thesaurus/narrower
ChicagoSmart Define. 1970. "extant paleocene first appearance thesaurus" https://smartdefine.org/extant_paleocene_first_appearance/thesaurus/narrower (accessed September 28, 2026).
HarvardSmart Define 1970, extant paleocene first appearance thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/extant_paleocene_first_appearance/thesaurus/narrower>.
MLASmart Define. "extant paleocene first appearance thesaurus" 1 January 1970. Web. 28 September 2026. <https://smartdefine.org/extant_paleocene_first_appearance/thesaurus/narrower>