WABASH COUNTY

FRIENDSVILLE MINE

MATTOON FORMATION

MISSOURIAN TO VIRGILIAN

MID- TO UPPER KASIMOVIAN EPOCH

EARLY LATE PENNSYLVIAN SUBPERIOD

LATE CARBONIFEROUS PERIOD

STEM: TETRAPODA GOODRICH, 1930

Incertae sedis

Gen. sp indet.

SUPERCLASS: AMNIOTA HAECKEL, 1866

Incertae sedis

Gen. sp indet.

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: SYNAPSIDA OSBORN, 1903

ORDER: PELYCOSAURIA COPE, 1878

SUBORDER: EUPELYCOSAURIA KEMP, 1982

INFRAORDER: DIMETRODONTOMORPHA emend NOPCSA, 1925

Family: SPHENACODONTIDAE Marsh, 1878

Incertae sedis

Gen. sp indet.