Echinochiton

Echinochiton Temporal range: Middle Ordovician PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Polyplacophora
Order:	Paleoloricata
Family:	Echinochitonidae Pojeta et al., 2003
Genus:	Echinochiton Pojeta et al., 2003
Species:	E. dufoei
Binomial name
Echinochiton dufoei Pojeta et al., 2003

Echinochiton is an Ordovician chiton with hollow spines on its margins; these spines, which are unique among the chitons, have a strong organic component and show growth lines.