EUROPEAN RUSSIA

MARI EL REPUBLIC

GORNOMARIISKII DISTRICT

DIRECTLY DOWNSTREAM FROM THE MOUTH OF THE SUNDRY RIVER

RIGHT BANK OF THE VOLGA RIVER (SOUTHERN SHORE OF THE CHEBOKSARY RESERVOIR)

SUNDRY-1 LOCALITY

SUNDYR ASSEMBLAGE

LATEST DINOCEPHALIAN SUPERASSEMBLAGE

LATE TITANOPHONEUS TETRAPOD ZONE

LOWER UPPER SUBSTAGE

LOWER UPPER SEVERODVINIAN STAGE

LOWER TATARIAN SERIES

LATE PERMIAN

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: AMPHIBIA LINNAEUS, 1758

SUBCLASS: LABYRINTHODONTIA OWEN, 1860

SUPERORDER: TEMNOSPONDYLIA ZITTEL, 1887

MICROORDER: LIMNARCHIA YATES & WARREN, 2000

ORDER: DVINOSAURIA YATES & WARREN, 2000

INFRAORDER: TRIMERORHACHOIDA ROMER, 1947

Superfamily: DVINOSAUROIDEA Watson, 1919

Family: DVINOSAURIDAE Amalitzky, 1921

*Dvinosaurus gubin
= Dvinosaurus cf. primus

NEOTETRAPODA

SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934

ORDER: SEYMOURIAMORPHA WATSON, 1917

SUBORDER: SEYMOURIDA TATARINOV, 1971

Superfamily: KOTLASSOIDEA Romer, 1933 (sensu Vjuschkov, 1957)

Family: KOTLASSIDAE Romer, 1933

Subfamily: ENOSUCHIDAE Konzukova, 1955

Enosuchus cf. breviceps
*Enosuchus alveolatus

Subfamily: LEPTOROPHINAE Ivakhenko, 1988

Leptoropha sp

Subfamily: KOTLASSIINAE Romer, 1933

Microphon exiguous

SUBORDER: CHRONIOSUCHIDA TATARINOV, 1971

Family: CHRONIOSUCHIDAE Vjuschkov, 1957

Suchonica vladimiri