Fossil Information (Phanerozoic Eon)
| ID: | 109 |
| Fossil Type: | Shell |
| Fossil Description: | Pycnodonte (Gryphaea, Phygraea) convexa (prehistoric oyster) |
| Status: | Extinct |
| Relative Size: | Medium |
| Class: | Bivalvia |
| Subclass: | Pteriomorphia, Pteriomorpha |
| Order: | Ostreoida |
| Suborder: | Ostreina |
| Superfamily: | Ostracea, Ostraceae, Ostreacea, Ostreoidea |
| Family: | Pycnodonteidae, Gryphaeidae |
| Subfamily: | Pycnodonteina |
| Scientific Name (Genus species): | Pycnodonte convexa (Say, 1820) or Pyncnodonte mutabilis (Morton) |
| Era/Period: | Mesozoic/Cretaceous |
| Epoch/Age: | Maastrichtian |
| MYA: | About 72 |
| Discovery Location (Water, Land): | Poricy Brook |
| Discovery Location (City, ST): | Middletown, NJ |
| Discovery Location (County): | Monmouth |
| Deepest Formation: | Navesink |
| Color: | Gray |
| Comments: | Smooth, similar to modern oyster, left valve curved, right valve flat (62-78 mya) |
| Collector Name: | RLD |
| Image Filename 1: | DSCF3583.jpg |
| Image Filename 2: | DSCF3586.jpg |