| Name | Age | Stage | Formation | Member | Comment |
|---|---|---|---|---|---|
| Pycnodonte belli Stephenson, 1941 |
Cretaceous | Lower Maestrichtian | U. Corsicana Marl | found with Exogyra costata | |
| Pycnodonte (Pycnodonte) mutabilis Morton,1828 |
Cretaceous | Lower Maestrichtian | Demopolis | found with Exogyra cancellata | |
| Pycnodonte (Phygraea) convexa
Say, 1820 |
Cretaceous | Campanian | Mooreville | Lower | |
| Pycnodonte (Phygraea) aucella
Roemer, 1849 |
Cretaceous | Middle Santonian | Austin Chalk | formation type locality | |
| Pycnodonte newberryi | Cretaceous | Turonian | Dakota Sandstone | Gryphaea | Found 3m above E. olisoponensis conglomerate |
| Pycnodonte kansasense | Cretaceous | L Turonian | Greenhorn | not yet collected | |
| Pycnodonte wardii | Cretaceous | Lower Albian | Glen Rose | lower | |
| Pycnodonte panda
Morton, 1833 |
Cretaceous | Coniacian-Turonian | Ozan & Eutaw |
