Parapuzosia seppenradensis
Parapuzosia seppenradensis is the largest known species of ammonite. It lived during the Lower Campanian Epoch of the Late Cretaceous period, in marine environments in what is now Westphalia, Germany. A specimen, found in Seppenrade near Lüdinghausen, Germany in 1895 measures in diameter, although the living chamber is incomplete.
The original fossile is shown in the foyer of the Westphalian Museum of Natural History, Münster, Germany. It is estimated that if complete, this specimen would have had a diameter of approximately or even. The total live mass has been estimated at, of which the shell would constitute.
