ILLINOIS
VERMILLION COUNTY
DANVILLE
HORSESHOE BEND OF VERMILLION RIVER
MACOUPIN LIMESTONE MEMBER
PATOAK FORMATION ("CLEPSYDROPS SHALES")
EARLY MISSOURIAN STAGE
EARLY KASIMOVIAN EPOCH
LATE PENNSYLVANIAN SUBPERIOD
LATE CARBONIFEROUS PERIOD-ASSELIAN STAGE
ROTLEGENDES EPOCH
EARLY PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
NEOTETRAPODA
SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934
Family: Incertae sedis
Non *Cricotus heteroclitus
= *Cricotus gibsoni
= *Cricotus discophorusSUBCLASS: LEPOSPONDYLI ZITTEL, 1888
ORDER: NECTRIDEA MIALL, 1875
Family: DIPLOCAULIDAE Cope, 1881
*Diplocaulus salamandroides
CLASS: REPTILIA LAURENTI, 1768
Incertae sedis
Gen. sp indet.
SUBCLASS: PARAREPTILIA OLSON 1947
INFRACLASS: SAUROPSIDA HUXLEY, 1864
ORDER: COTYLOSAURIA COPE, 1880
SUBORDER: DIADECTOMORPHA Watson, 1917
Incerate sedis
Gen. sp indet.
ORDER: CAPTORHINOMORPHA WATSON, 1917
SUBORDER: CAPTORHINOMORPHA WATSON, 1917
Family: CAPTORHINIDAE Case, 1911
Gen. sp indet.
SUBCLASS: SYNAPSIDA OSBORN, 1903
ORDER: PELYCOSAURIA COPE, 1878
SUBORDER: EUPELYCOSAURIA KEMP, 1982
INFRAORDER: OPHIACHODONTIA NOVA
Family: OPHIACODONTIDAE Nopsca, 1923
*Clepsydrops collettii
= *Clepsydrops vinslovii
= *Clepsydrops pedunculatus
= *Archaeobelus vellicatus
= ?*Captorhinus illinoisensis
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ILLINOIS
VERMILION COUNTY
DANVILLE
LATE PENNSYLVANIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: SYNAPSIDA OSBORN, 1903
ORDER: PELYCOSAURIA COPE, 1878
SUBORDER: EUPELYCOSAURIA KEMP, 1982
INFRAORDER: OPHIACHODONTIA NOVA
Family: OPHIACODONTIDAE Nopsca, 1923
Clepsydrops sp
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ILLINOIS
VERMILION COUNTY
DANVILLE
LOWER CONEMAUGH
STEPHANIAN
UPPER SILESIAN
UPPER KASIMOVIAN TO GZELIAN EPOCH
LATEST PENNSYLVANIAN (LATEST CARBONIFEROUS)
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
LABYRINTHODONTIA OR LEPOSPONDYLI
Incertae sedis
*Proterpeton gurleyi
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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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ILLLINOIS
VERMILION COUNTY
OAKWOOD
ASSELIAN STAGE
ROTLIEGENDES EPOCH
EARLY EARLY PERMIAN
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: AMPHIBIA LINNAEUS, 1758
NEOTETRAPODA
SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934
Family: Incertae sedis
Non Cricotus heteroclitus
SUBCLASS: LEPOSPONDYLI ZITTEL, 1888
ORDER: NECTRIDEA MIALL, 1875
Family: DIPLOCAULIDAE Cope, 1881
Diplocaulus salamandroides
ORDER: LYSOROPHIA WILLISTON, 1908
Family: COCYTINIDAE Cope, 1875
Incertae sedis
Lysorophus cf. tricarinatus
CLASS: REPTILIA LAURENTI, 1768
Incertae sedis
Gen. sp indet.
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