EUROPEAN RUSSIA
KUYBYSHEV PROVINCE
ALEXEYEVKA DISTRICT
KAVOLZHAN RIVER REGION
NOVO TAVOLZHANKA
SLUDKIAN HORIZON
VETLUGA FORMATION
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
*Prothoosuchus blomi
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EASTERN EUROPEAN RUSSIA
KUYBYSHEV PROVINCE
ALEXEYEVAK DISTRICT
SAMARA RIVER REGION
BLUBOKOGO
SLUDKIAN HORIZON
VETLUGA FORMATION
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
Prothoosuchus blomi
= Prothoosuchus samariensis
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