| Named By: | Nowak in 1913 |
| Time Period: | Cenomanian-Campanian[1] |
| Location: | Across Europe and the USA |
| Size: | Shell of P. bradyi up to around 1.8 meters across at the widest diameter. Largest fossil shell of P. seppenradensis is 1.8 meters at widest diameter, but this specimen is incomplete. Estimates of the complete shell range from 2.55 to 3.5 meters across. This are the largest known examples, most others smaller |
| Diet: | Carnivore |
| Fossil(s): | Many individuals |
| Classification: | | Mollusca | Cephalopoda | Ammonoidea | Desmoceratidae | |
| Also known as: | | Pachydiscus seppenradensis | |
Parapuzosia is an extinct genus of desmoceratid ammonites from the Cenomanian to the Campanian of Africa, Europe, and North America. They are typically very large ammonites, reaching diameters of 60 cm (2.0 ft) or more, with the largest species measuring upwards of more than 3 m (9.8 ft). It possesses a moderately involute shell with flat or slightly rounded sides. Distinct primary and secondary ribbing can be observed in the inner whorls.