The creatures display an unexpected mix of features. Punk ferox, while resembling worm-like mollusks with its array of long spines, also possessed a broad foot and gills similar to modern chitons. Emo ...

The discovery challenges the longstanding view that early mollusks from the group known as Aculifera – which include chitons and worm-like mollusks – were basic and primitive. Instead, the ‘rebellious ...