EUROPEAN RUSSIA

CHUVASH REPUBLIC

MORGAUSHSKII DISTRICT

VOMBA-KASSY LOCALITY

VYATKA HORIZON

SCUTOSAURUS KARPINSKII ZONE

UPPER TATARIAN AGE

LOPINGIAN SUBEPOCH

ZECHSTEIN EPOCH

LATE PERMIAN

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: AMPHIBIA LINNAEUS, 1758

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: KOTLASSIINAE Romer, 1933

Microphon sp

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EUROPEAN RUSSIA

AUTONOMOUS REPUBLIC OF CHUVASHIA

IBRESI DISTRICT

BOINSK

RIGHT BANK OF VOLGA (POVOLZH’E) RIVER

BUINSK MINE OIL SHALES

DORSOPLANITES PANDERI ZONE

MIDDLE VOLGIAN

KIMMERIDGIAN STAGE

MIDDLE MALM EPOCH

LATE JURASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

INFRACLASS: EURYAPSIDA COLBERT, 1945

SUPERORDER: SAUROPTERYGIA OWEN, 1860

GRANDORDER: EOSAUROPTERYGIA emend RIEPPEL, 1994

ORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835

SUBORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835

INFRAORDER: PLIOSAUROMORPHA NOVA

Superfamily: PLIOSAUROIDEA Seeley, 1874

Family: PLIOSAURIDAE Seeley, 1874

*Liopleurodon rossicus
= Pliosaurus rossicus

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EUROPEAN RUSSIA

CHUVASHIA REPUBLIC

PORETSKII DISTRICT

MENYA RIVER

LEFT TRIBUTARY OF THE SAURA RIVER

SPEETONICERAS VERISCOLOR ZONE

UPPER HAUTERIVIAN STAGE

UPPER NEOCOMIAN SUBEPOCH

MIDDLE EARLY CRETACEOUS EPOCH

EARLY EARLY CRETACEOUS

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

INFRACLASS: EURYAPSIDA COLBERT, 1945

SUPERORDER: SAUROPTERYGIA OWEN 1860

GRANDORDER: EOSAUROPTERYGIA emend RIEPPEL, 1994

ORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835

SUBORDER: PLESIOSAURIA OWEN, 1840 NON BLAINVILLE, 1835

INFRAORDER: PLESIOSAUROMORPHA NOVA

EUPLESIOSAURIA O’KEEFE, 2001

Superfamily: CRYPTOCLEIDOIDEA Williston, 1925

TRICLEDIA O’KEEFE, 2001

Family: ARISTONECTIDAE O'KEEFE & STREET, 2009

*Abyssosaurus nataliae

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