Parent taxon: Polyplacophora according to E. Schwabe and P. Lozouet 2006
See also Abbott 1974, Beesley 1998, Pacaud and Le Renard 1995, Sepkoski 2002 and Zalvide et al. 2004
Sister taxa: Callochitonidae, Chitonida, Dycheiidae, Mesoplacophora, Multiplacophora, Paleoloricata, Prisochiton, Trachydermon, Oligochiton
Subtaxa: Abyssochitonidae Acanthochitonina Afossochiton Austrochiton Beloplaxus Chaetopleuridae Chitonina Colapterochiton Crenatolorica Cryptoplacidae Cymatochitonina Elachychiton Eulachychiton Euleptochiton Glaphurochiton Glyptochiton Guildingia Ischnochitonina Kindbladochiton Laculina Lavenachiton Lepidopleurina Lirachiton Llandeilochiton Loboarochiton Mesochiton Permochiton Proleptochiton Protalochiton Protochiton Pseudoischnochiton Trachypleura Xylochitonidae
Ecology: facultatively mobile epifaunal grazer