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 discophorus

SUBCLASS: 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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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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