SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: AMPHIBIA LINNAEUS, 1758

SUBCLASS: LABYRINTHODONTIA OWEN, 1860

SUPERORDER: TEMNOSPONDYLIA ZITTEL, 1887

MICROORDER: LIMNARCHIA YATES & WARREN, 2000

ORDER: CAPITOSAURIA ROMER, 1947

Superfamily: CAPITOSAUROIDEA Watson, 1919 (sensu Romer, 1947)

Family: CYCLOTOSAURIDAE Shiskin, 1964

Subfamily: CYCLOTOSAURINAE Shiskin, 1964 (sensu Otshev, 1966)

Cyclotosaurus robustus
= Capitosaurus robustus
= Mastodonsaurus robustus

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1903

INFRACLASS: NEODIAPSIDA BENTON, 1985

NEODIAPSIDA: INCERTAE SEDIS

OR AMNIOTA: INCERTAE SEDIS

MAGANORDER: ICHTHYOPTERYGIA BAUR, 1887 emend nova

SUPERORDER: EOICHTHYOSAURIA MOTANI, 1999

GRANDORDER: ICHTHYOSAURIA EMEND BLAINVILLE, 1835

MICRORDER: HUENEOSAURIA MAISCH & MATZKE, 2000

ORDER: MIXOSAUROIDEA (BAUR, 1887)

Family: MIXOSAURIDAE Baur, 1887

Subfamily: PHALARODONTINAE Maisch & Matzke, 2001

Contectopalatus atavus
= Ichthyosaurus atavus
= Mixosaurus atavus