EUROPEAN RUSSIA

GORKIY PROVINCE

ASTASHININSKOYI I

RYABINIAN HORIZON

EARLY TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: SYNAPSIDA OSBORN, 1903

SUPERORDER: THERASPID BROOM, 1905

GRANDORDER: EUTHERAPSIDA

MICRORDER: NEOTHERAPSIDA

ORDER: ANOMODONTIA WATSON & ROMER, 1956

SUBORDER: DICYNODONTIA OWEN, 1860

Superfamily: PRISTERODONTIA Cluver & King, 1983

Family: KANNEMEYERIDAE Huene, 1948

Subfamily: LYSTROSAURINAE Cope, 1870 (sensu Broom, 1903)

*Lystrosaurus georgi

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