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Protocardia subquadrata

Geological Range

Campanian to Maastrichtian

Paleogeographic Distribution

Colorado to Montana

Remarks

PaleoDB taxon number: 143319.

Stratigraphic Occurrences

Maastrichtian
Fox Hills Formation (CO)
Fox Hills Formation (SD)
Fox Hills Formation (Timber Lake Member) (SD)
Fox Hills Formation (Trail City Member) (SD)
Campanian
Pierre Shale (MT)
Pierre Shale (SD) [Campanian]
<i>Protocardia subquadrata</i> from the Maastrichtian Fox Hills Formation of Ziebach County, South Dakota (YPM 24649)
Protocardia subquadrata from the Maastrichtian Fox Hills Formation of Ziebach County, South Dakota (YPM 24649)
<i>Protocardia subquadrata</i> from the Maastrichtian Fox Hills Formation of Ziebach County, South Dakota (YPM 24192)
Protocardia subquadrata from the Maastrichtian Fox Hills Formation of Ziebach County, South Dakota (YPM 24192)
Stratigraphic position unknown
Stratigraphic position unknown