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Temporal range: Lower Cambrian–Permian
Scientific classification e
Kingdom: Animalia
Phylum: Mollusca
Class: Polyplacophora
Order: Multiplacophora
Hoare and Mapes 1995[1]

Multiplacophora is a stem-group of chitons with a number of plates arranged in 7 rows along the body.[2] They date to at least the Upper Cambrian, but two lower Cambrian fossils- Ocruranus and Trachyplax - may extend the range downwards.[3]


  1. ^ (PDF)  Missing or empty |title= (help)
  2. ^ Vendrasco, M. J.; Wood, T. E.; Runnegar, B. N. (2004). "Articulated Palaeozoic fossil with 17 plates greatly expands disparity of early chitons". Nature. 429 (6989): 288–291. Bibcode:2004Natur.429..288V. doi:10.1038/nature02548. PMID 15152250. 
  3. ^ Larsson, C. M.; Peel, J. S.; Högström, A. E. S. (2009). "Trachyplax arctica, a New Multiplated Problematic Fossil from the Lower Cambrian of North Greenland". Acta Palaeontologica Polonica. 54 (3): 513. doi:10.4202/app.2009.0026.