ILLINOIS
VERMILLION COUNTY
2 MILES SOUTH OF OAKWOOD
NORTH BANK OF SALT FORK AT THE TIP OF HORSESHOE BEND OF VERMILLION RIVER
MODESTO FORMATION
MIDDLE MCLEANSBORO GROUP
EARLY CONEMAUGH
WOLFCAMPANIAN
SAKMARIAN STAGE
UPPER LOWER TO LOWER MIDDLE ROTLIEGENDES EPOCH
EARLY PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
SUBCLASS: LEPOSPONDYLI ZITTEL, 1888
ORDER: LYSOROPHIA WILLISTON, 1908
Family: COCYTINIDAE Cope, 1875
Incertae sedis
*Lysorophus tricarinatus
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