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Temporal range: Pennsylvanian
Scientific classification e
Kingdom: Animalia
Phylum: Mollusca
Class: Polyplacophora
Family: Lepidopleuridae
Genus: Glaphurochiton

Glaphurochiton is a genus of fossil chitons known from the Mazon Creek biota.[1] Remarkably, it contains an intact radula, which with 17 teeth per row and over 100 rows is almost identical to the radula of modern chitons (even though the crown group emerged in the Mesozoic).[2] [3] The radula extends from the first to third shell plates.[2]


  1. ^ Hoare, R. D.; Mapes, R. H. (1986). "The Polyplacophoran "Chiton" carbonarius Stevens, 1858, in North America and New Related Species". Journal of Paleontology. 60 (3): 627–635. doi:10.2307/1305049. 
  2. ^ a b YOCHELSON, E. L. AND E. S. RICHARDSON JR. (1979). "Polyplacophoran molluscs of the Essex Fauna (Middle Pennsylvanian, Illinois)". In M. H. Nitecki (ed.). Mazon Creek Fossils. Academic Press, New York. pp. 321–332. 
  3. ^ Butterfield, N. J. (2008). "An Early Cambrian Radula". Journal of Paleontology. 82 (3): 543–554. doi:10.1666/07-066.1.