Ptychodus anonymous
- Phylum: Chordata
- Class: Chondrichthyes
- Order: Hybodontiformes
- Family: Ptychodontidae
- Genus: Ptychodus
- Species: Ptychodus anonymous Agassiz 1837
Geological Range
Cenomanian to Santonian
Paleogeographic Distribution
Texas to Colorado
Stratigraphic Occurrences
- Santonian
- Niobrara Formation (Smoky Hill) (KS)
- Turonian
- Carlile Shale (KS)
- Carlile Shale (Blue Hill Shale Member) (KS)
- Carlile Shale (Fairport Member) (KS)
- Greenhorn Limestone (CO)
- Greenhorn Limestone (Hartland Mbr) (CO)
- Greenhorn Limestone (KS)
- Greenhorn Limestone (Lincoln Member) (KS)
- Cenomanian
- Greenhorn Limestone (CO)
- Greenhorn Limestone (Lincoln Mbr) (CO)
- Greenhorn Limestone (KS)
- Greenhorn Limestone (Lincoln Shale Member) (KS)
- Lake Waco Formation (TX)
