Didymoceras stevensoni
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Specimen #286
Taxon: Didymoceras stevensoni
Locality: Boulder County, CO
Age: Cretaceous Period, Upper Campanian Stage
Rock unit: Didymoceras stevensoni zone of Pierre Shale
Collector: W. Itano
Didymoceras was an unusual ammonite which coiled like
a spired gastropod.
This is a fragment of the middle part.
It was identified by Dr. William Cobban of the U.S.G.S.
(Length 5.7 cm.)
A more complete specimen from the "Worldwide Museum of Natural
History" can be seen here.
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