Class Polyplacophora de Blainville 1816 (chiton)
Synonym: Amphineura
Parent taxon: Serialia according to G. Giribet et al. 2006
See also Barnes 1998, Martin 1904, Sepkoski 2002 and Wells and Houston 2001
Sister taxon: Monoplacophora
Subtaxa: Callochitonidae Chitonida Dycheiidae Mesoplacophora Multiplacophora Neoloricata Oligochiton Paleoloricata Prisochiton Trachydermon
Ecology: facultatively mobile epifaunal grazer