EUROPEAN RUSSIA
SOUTHERN URALS
ORENBURGE REGION
GAISKII DISTIRCT
5 KM WEST OF THE VILLAGE OF IZHBERDA
IZHBERDA LOCALITY
CAMPANIAN STAGE
SENONIAN SUBEPOCH
UPPER GULF EPOCH
LATE 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: POLYCOTYLIDAE Cope, 1869
*Polycotylus sopozkoi