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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