Phylloceras

noun

Phyl·​loc·​er·​as

fə̇ˈläsərəs

: a genus (the type of the family Phylloceratidae) comprising smooth involute compressed ammonites with complex sutures that occur first in the Triassic and are believed to have been ancestral to most Jurassic and Cretaceous ammonites

Word History

Etymology

New Latin Phyllocerat-, Phylloceras, from phyll- + -cerat-, -ceras -ceras

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