ARKANSAS

WASHINGTON COUNTY

BALDWIN COAL

WOOLSEY MEMBER

BLOYD FORMTION

MORROW SERIES

EALRY PENNSYLVANIAN

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: AMPHIBIA LINNAEUS, 1758

NEOTETRAPODA

SUBCLASS: REPTILIOMORPHA SAVE-SODERBERGH, 1934

ORDER: ANTHRACOSAURIA WATSON, 1917

SUBORDER: ANTHRACOSAURIA SAVE-SODERBRGH, 1934

Family: ANTHRACOSAURIDAE Cope, 1875

Anthracosaurus lancifer
= Rhizodus lancifer
= Erpetosuchus kansensis

*Eobaphetes kansensis
= Erpetosaurus kansensis
= Erpetosuchus kansensis