570 vanished lives

221Mesozoic

This lightly built two-meter hunter represents an early branch from the first dinosaur diversification.

313Mesozoic

Its adult shell stretched into a near-straight rod while retaining ammonite sutures.

314Mesozoic

A huge internal shell identifies a large coleoidean, though total length remains uncertain.

315Mesozoic

The juvenile shell coiled tightly before the adult chamber uncoiled and hooked back.

434Mesozoic

A coiled shell nearly two meters wide belonged to the largest known ammonite.

435Mesozoic

Rare soft tissues restore the ink sac, fins and ten hooked arms around an internal shell.