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noun
Any ammonite (Ammonoidea) of the Jurassic period, descended from Psiloceras, the sole surviving ammonite genus of the Triassic–Jurassic extinction event.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From neo- + ammonite.
