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: MASTODONSAURIDAE Lydekker, 1885

Mastodonsaurus giganteus
= Salamandroides jaegeri
= Labyrinthodon jaegeri
= Batrachosaurus jaegeri

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

SUPERLEGION: NEODIAPSIDA BENTON, 1985

SUPERORDER: SAUROPTERYGIA OWEN 1860

OR NEODIAPSIDA: INCERTAE SEDIS

ORDER: PLACODONTIA MEYER, 1863

SUBORDER: PLACODONTOIDEA COPE, 1871

Family: PLACODONTIDAE Meyer, 1863

Placodus gigas

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 mordax

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