EUROPEAN RUSSIA
ARKHANGELSK REGION
MEZENSKII DISTRICT
GLYADNAYA SHCHEL’YA LOCALITY
KRASNOSHCHEL’YA FORMATION
URZHUMIAN HORIZON
MEZEN FAUNAL ASSEMBLAGE
LOWER TATARIAN AGE
CAPITANIAN STAGE
MIDDLE ZECHSTEIN EPOCH
LATE MIDDLE PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
NEOTETRAPODA
SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934
ORDER: SEYMOURIAMORPHA WATSON, 1917
SUBORDER: NYCTEROLETERIDAE TATARINOV, 1972
Family: NYCTEROLETERIDAE Romer, 1956
Subfamily: NYCTEROLECTERINAE Romer, 1956
Macroleter poezicus
Subfamily: BASHKYROLETERINAE Ivachnenko, 1997
*Bashkyroleter mesensis
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: PARAREPTILIA OLSON 1947
INFRACLASS: SAUROPSIDA HUXLEY, 1864
ORDER: PROCOLOPHONOMORPHA ROMER, 1964
SUBORDER: PROCOLPHOMORPHA SEELEY, 1888
Family: NYCTIPHRURETIDAE Efremov, 1938
*Nyctiphruretus acudens
SUBCLASS: DIAPSIDA OSBORN, 1904
Incertae sedis
*Lanthanolania ivakhenennkoi
SUBCLASS: SYNAPSIDA OSBORN, 1903
ORDER: PELYCOSAURIA COPE, 1878
SUBORDER: EUPELYCOSAURIA KEMP, 1982
INFRAORDER: OPHIACHODONTIA NOVA
Family: VARANOPSEIDAE Romer & Price, 1940
Subfamily: MYCTEROSAURINAE Reisz & Berman, 2001
Mesenosaurus romeri
SUPERORDER: THERASPIDA BROOM, 1905
ORDER: EOTHERIODONTIA OLSON, 1962
Incertae sedis
Family: NIKKASAURIDAE Ivakhnenko, 2000
*Nikkasaurus tatarinovi
*Reiszia gubini
INFRAORDER: EOTITANOSUCHIA BOONSTRA, 1963
Family: NIIAFTASUCHIDAE Ivakhenko, 1990
Niaftasuchus zekkeli
Family: ALRAUSUCHIDAE Ivakhenko, 2008
Alrausuchus tagax
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EUROPEAN RUSSIA
ARKHANGELSK REGION
MEZENSKII DISTRICT
UST’-PEZA LOCALITY
UPPER KAZANIAN SUBSTAGE OR
LOWER TATARIAN AGE
LOPINGIAN SUBEPOCH
UPPER ZECHSTEIN EPOCH
LATE PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: SYNAPSIDA OSBORN, 1903
SUPERORDER: THERASPIDA BROOM, 1905
ORDER: EOTHERIODONTIA OLSON, 1962
SUBORDER: EOTITANOSUCHIA BOONSTRA, 1963
INFRAORDER: EOTITANOSUCHIA BOONSTRA, 1963
Family: EOTITANOSUCHIDAE CHUDINOV, 1960
Biarmosuchus tagax
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EUROPEAN RUSSIA
ARKHANGELSK REGION
MEZENSKII DISTRICT
UST’-VASHKA LOCALITY
UPPER KAZANIAN SUBSTAGE OR
LOWER TATARIAN AGE
LOPINGIAN SUBEPOCH
UPPER ZECHSTEIN EPOCH
LATE PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: SYNAPSIDA OSBORN, 1903
SUPERORDER: THERASPIDA BROOM, 1905
ORDER: EOTHERIODONTIA OLSON, 1962
SUBORDER: EOTITANOSUCHIA BOONSTRA, 1963
INFRAORDER: EOTITANOSUCHIA BOONSTRA, 1963
Family: EOTITANOSUCHIDAE CHUDINOV, 1960
Biarmosuchus tagax
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EUROPEAN RUSSIA
ARKHANGEL’SK REGION
LOWER MEZEN RIVER
ZONE III
LOWER TATARIAN AGE
LOPINGIAN SUBEPOCH
UPPER 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: NYCTEROLETERIDAE TATARINOV, 1972
Family: NYCTEROLETERIDAE Romer, 1956
Subfamily: NYCTEROLECTERINAE Romer, 1956
*Nycteroleter ineptus
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