UK Ammonite Discoscaphites
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Discoscaphites gulosus
Fox Hills Formation POAZ Trail City Mbr.
Upper Cretaceous (Maastrichtian)
Corson County, South Dakota
Sold to
Gerardo Gonzalez
Here is an outstanding specimen of the D. gulosus. It has wonderful original shell and good iridescence. The specimen is just over 3 inches. It is a complete ammonite all the way to the aperture.
The macroconch is robust with strong ornamentation, usually five or six rows of tubercles. The microconch usually has four or five rows of tubercles. Stratigraphically younger forms of both dimorphs may or may not develop mid-ventral tubercles on the body chamber.
The Trail City Member of the Fox Hills Formation is a light-grey clayey silt that forms the lower 65 - 210 feet of the formation in the type area. It contains several limestone concretion zones with a rich ammonite and pelecypod fauna.
$175