Synonyms|0Antonyms|0|Broader|2Narrower|0Related|36
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rupelian first appearance(noun, animal, geohistory, appearance)
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white river fauna(noun, geohistory, fauna, nebraska)
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APASmart Define. (1970). Protoceras thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/protoceras/thesaurus/broader
ChicagoSmart Define. 1970. "Protoceras thesaurus" https://smartdefine.org/protoceras/thesaurus/broader (accessed September 25, 2026).
HarvardSmart Define 1970, Protoceras thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/protoceras/thesaurus/broader>.
MLASmart Define. "Protoceras thesaurus" 1 January 1970. Web. 25 September 2026. <https://smartdefine.org/protoceras/thesaurus/broader>