EUROPEAN RUSSIA

YAROSLAVL’ PROVINCE

RYBINSKAYA DISTRICT

RYBINSK

TIKHVINSKOYE

RYBINSKIAN AND SLUDKIAN HORIZONS

VETLUGA SERIES

SMITHIAN SUBSTAGE

UPPER NAMMALIAN STAGE

LOWER SCYTHIAN EPOCH

EARLY TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: AMPHIBIA LINNAEUS, 1758

SUBCLASS: LABYRINTHODONTIA OWEN, 1860

SUPERORDER: TEMNOSPONDYLIA ZITTEL, 1887

MICROORDER: LIMNARCHIA YATES & WARREN, 2000

ORDER: TREMATOSAURIA PIVETEAU, 1955

Superfamily: TREMATOSAUROIDEA Save-Soderbergh, 1935

Family: BENTHOSUCHIDAE Efremov, 1931

Subfamily: THOOSUCHINAE Getmanov, 1982

*Thoosuchus jakovlevi
= Trematosuchus (?) jakovlevi

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