Bellerophon, a planispiral snail, is one of the best-known fossils of the Dolomites: it lends the Bellerophon Formation its name and bears witness to the definitive arrival of the sea at the end of the Permian period. This exhibit shows the snail together with a large Tainoceras malsineri, ancestor of today's Nautilus cephalopod. The large number of microfossils (calcareous algae and foraminifers) testifies to the wide variety of life forms in existence shortly before the mass extinction.

This fossil fish is unique. Thanks to the microfossils contained in the rock, it could be dated back to the Permian-Triassic extinction event (about 252 million years ago). This was a crucial moment in the Earth's history, when life itself was threatened with extinction. Archaeolepidotus represents the Parasemionotiformes, which were already around in the Late Permian and then underwent extensive development in the Early Triassic. The majority of today's fish originate from this group.