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Goniomya americana

Geological Range

Maastrichtian

Paleogeographic Distribution

Colorado to Montana

Stratigraphic Occurrences

Maastrichtian
Fox Hills Formation (SD)
Fox Hills Formation (WY)
Fox Hills Formation (Timber Lake Member) (SD)
Fox Hills Formation (Trail City Member) (SD)
<i>Goniomya americana</i> from the Fox Hills Formation of Dewey County, South Dakota (YPM 24148).
Goniomya americana from the Fox Hills Formation of Dewey County, South Dakota (YPM 24148).
Stratigraphic position unknown
Stratigraphic position unknown