Parent taxon: Polyplacophora according to Y. Wu and D. E. Lee 2024
See also Abbott 1974, Beesley 1998, Pacaud and Le Renard 1995, Schwabe and Lozouet 2006, Sepkoski 2002, Sutton and Sigwart 2012 and Zalvide et al. 2004
Sister taxa: Dycheiidae, Emo, Heloplacidae, Mesoplacophora, Multiplacophora, Paleoloricata, Prisochiton, Trachydermon, Oligochiton
Subtaxa: Abyssochitonidae Afossochiton Austrochiton Beloplaxus Callochitonida Chaetopleuridae Chitonida Chitonina Crenatolorica Cryptoplacidae Cymatochitonina Elachychiton Eulachychiton Euleptochiton Guildingia Ischnochitonina Kindbladochiton Laculina Lavenachiton Lepidopleurida Lepidopleurina Lirachiton Llandeilochiton Loboarochiton Mesochiton Permochiton Proleptochiton Protalochiton Protochiton Pseudoischnochiton Trachypleura Xylochitonidae
Ecology: facultatively mobile epifaunal grazer