Class Polyplacophora de Blainville 1816 (chiton)
PaleoDB taxon number: 8023
Synonym: Amphineura (taxon 97718)
Parent taxon: Serialia according to G. Giribet et al. 2006
Sister taxon: Monoplacophora
Subtaxa: Callochitonidae, Dycheiidae, Mesoplacophora, Multiplacophora, Neoloricata, Oligochiton, Paleoloricata, Prisochiton
Ecology: facultatively mobile epifaunal grazer