EUROPEAN RUSSIA
VOLOGDA PROVINCE
VAKHENVO LOCALITY
RYBINSKIAN HORIZON
MIDDLE TRIASSIC
STEM: TETRAPODA GOODRICH, 1930
_____________________________________________________________________________________SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
NEOTETRAPODA
SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934
ORDER: SEYMOURIAMORPHA WATSON, 1917
SUBORDER: CHRONIOSUCHIDA TATARINOV, 1971
Family: BYSTROWIANIDAE Vjushkov, 1957
*Dromotectum spinosum