PENNSYLVANIAN
BEAVER COUNTY
MANSFIELD MINE
ROOF SHALE OF UPPER KITTANNING COAL
ALLEGHENY GROUP
UPPER WESTPHALIAN D
MYACHKOVSKIAN STAGE
LOWER UPPER SILESIAN SERIES
UPPER MOSCOVIAN EPOCH
MIDDLE PENNSYLVANIAN (LATE CARBONIFEROUS)
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
SUBCLASS: LEPOSPONDYLI ZITTEL, 1888
ORDER: AISTOPODA MIALL, 1875
Family: OESTOCEPHALIDAE Anderson, 2003
Oestocephalus amphiuminum
= Ophiderpeton amphiuminis
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