EUROPEAN RUSSIA

TETYUSHI DISTRICT

RIGHT BANK OF THE VOLGA RIVER

VILLAGE OF IL’INSKOE

SYOMIN OVRAG RAVINE

NORTH DVINA HORIZON

UPER SUB STAGE

TATARINAN STAGE

LATE PERMIAN

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT: AVEMETATARSALIA BENTON, 1999

COHORT: PROLACERTIFORMES CAMP, 1945 NOVA

MAGNORDER: PROTOROSAURIA HUXLEY, 1871

Superfamily: PROTOROSAUROIDEA Lydekker, 1888 (sensu Kuhn, 1969)

Family: PROTOROSAURIDAE Lydekker, 1888

*Eorasaurus olsoni