Pseudoperna congesta
- Phylum: Mollusca
- Class: Bivalvia
- Order: Ostreida
- Family: Ostreidae
- Genus: Pseudoperna
- Species: Pseudoperna congesta Conrad 1843
Geological Range
Turonian to Campanian
Paleogeographic Distribution
Kansas to Montana
Stratigraphic Occurrences
- Campanian
- Pierre Shale (SD) [Campanian]
- Santonian
- Niobrara Formation (CO)
- Niobrara Formation (Smoky Hill) (KS)
- Coniacian
- Niobrara Formation (Fort Hays Member) (CO)
- Niobrara Formation (KS)
- Niobrara Formation (Smoky Hill Member) (KS)
- Turonian
- Carlile Shale (KS)
- Carlile Shale (Blue Hill Shale Member) (KS)
- Carlile Shale (Fairport Member) (KS)
- Unknown Stage
- Fox Hills Formation (MT)
- Mancos Shale (NM)
- Niobrara Formation (CO)
- Niobrara Formation (Smoky Hill Mbr) (KS)
- Niobrara Formation (SD)
- Niobrara Formation (WY)
