Name: Zemistephanus.
Phonetic: Zem-e-stef-ah-nus.
Named By: McLearn‭ ‬-‭ ‬1927.
Classification: Mollusca,‭ ‬Cephalopoda,‭ ‬Ammonoidea,‭ ‬Ammonitida,‭ ‬Stephanocerataceae,‭ ‬Otoitidae.
Species: Z.‭ ‬armatus,‭ ‬Z.‭ ‬corona.
Diet: Carnivore.
Size: Unavailable.
Known locations: Australia‭ ‬-‭ ‬Newmarracarra Limestone Formation.‭ ‬Possible also North America.
Time period: Bajocian of the Jurassic.
Fossil representation: Many individuals represented by fossilised shells.

       Zemistephanus is a genus of ammonite that lived in the Mid Jurassic seas.

Further reading
-‭ ‬Treatise on Invertebrate Paleontology,‭ ‬Part L,‭ ‬Mollusca‭ ‬4,‭ ‬Cephalopoda‭ ‬-‭ ‬Ammonoidea‭ ‬1-490.‭ ‬-‭ ‬W.‭ ‬J.‭ ‬Arkell,‭ ‬W.‭ ‬M.‭ ‬Furnish,‭ ‬B.‭ ‬Kummel,‭ ‬A.‭ ‬K.‭ ‬Miller,‭ ‬R.‭ ‬C.‭ ‬Moore,‭ ‬O.‭ ‬H.‭ ‬Schindewolf,‭ ‬P.‭ ‬C.‭ ‬Sylvester-Bradley‭ & ‬C.‭ ‬W.‭ ‬Wright‭ ‬-‭ ‬1957.


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