†family Preacanthochitonidae Bergenhayn 1960 (chiton)

Polyplacophora - Paleoloricata - Preacanthochitonidae

Full reference: J.R.M. Bergenhayn. 1960. Cambrian and Ordovician loricates from North America. Journal of Paleontology 34(2):168-178

Parent taxon: Chelodina according to B. Runnegar et al. 1979

Sister taxa: Gotlandochitonidae, Helminthochitonidae, Scanochitonidae, Septemchitonidae

Subtaxa: Listrochiton Orthriochiton

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Ecology: facultatively mobile epifaunal grazer

Distribution:

• Ordovician of United States (3: Kentucky collections)

• Cambrian of United States (3: Missouri, Utah)

Total: 6 collections each including a single occurrence

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