Pannoniasaurus
| Pannoniasaurus Temporal range: Late Cretaceous, | |
|---|---|
| Known remains and skeletal restorations | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Clade: | †Mosasauria |
| Family: | †Mosasauridae |
| Clade: | †Russellosaurina |
| Subfamily: | †Tethysaurinae |
| Genus: | †Pannoniasaurus Makádi, Caldwell & Ősi, 2012 |
| Type species | |
| †Pannoniasaurus inexpectatus Makádi, Caldwell & Ősi, 2012 | |
Pannoniasaurus is an extinct genus of tethysaurine mosasauroid known from the Late Cretaceous Csehbánya Formation and Ajka Coal Formation (Santonian stage) of Hungary. It contains a single species, Pannoniasaurus inexpectatus, dubbed "unexpected" because it was discovered in freshwater sediments, unlike other mosasaurs, which were marine predators. It was a medium-sized mosasaur, reaching up to 6 metres (20 ft) in length.