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Published online by Cambridge University Press: 20 May 2016
Extraordinarily large, thick shelled polyplacophorans occur in the Permian limestone in the province of Perak, Malaysia. Three new genera and species are proposed: Hadrochiton pileus, Pyknochiton lunatus, and Kraterochiton magnificus. The occurrence of K. magnificus extends the range of the family Acutichitonidae into the Middle Permian.