EUROPEAN RUSSIA

VOLOGDA PROVINCE

SHARZHENGA RIVER

VAKHNEVO

RYBINSKIAN GORIZONT

EARLY TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: PARAREPTILIA OLSON 1947

INFRACLASS: SAUROPSIDA HUXLEY, 1864

ORDER: PROCOLOPHONOMORPHA ROMER, 1964

SUBORDER: PROCOLPHOMORPHA SEELEY, 1888

Family: PROCOLOPHONIDAE, Seeley, 1888

Subfamily: PROCOLOPHONINAE Seeley, 1888 (sensu Romer, 1956)

*Tichvinskia jugensis

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