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Crassostrea subtrigonalis

Geological Range

Maastrichtian

Paleogeographic Distribution

Wyoming to South Dakota

Stratigraphic Occurrences

Maastrichtian
Fox Hills Formation (WY)
Fox Hills Formation (Iron Lightning Member) (SD)
Fox Hills Formation (Timber Lake Member) (SD)
<i>Crassostrea subtrigonalis</i> from the Fox Hills Formation (Iron Lightning Member) of Ziebach County, South Dakota (YPM 24419).
Crassostrea subtrigonalis from the Fox Hills Formation (Iron Lightning Member) of Ziebach County, South Dakota (YPM 24419).
Stratigraphic position unknown
Stratigraphic position unknown