Callistochiton

''Callistochiton'' is a genus of polyplacophoran

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s, alive today, of which fossils are known from the

Pliocene The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58Neogene molluscs Chiton genera Miocene genus first appearances Pliocene extinctions Ischnochitonidae Chitonida {{chiton-stub