Holotype: ROM
Locality: Mazon Creek near Morris, Grundy County, Illinois.
Horizon: Carbondale Formation, Frances Creek Shale.
Biostratigraphy:
Age: Westphalian D, Lower Upper Silesian, Desmoniensean, Myachkovskian Stage, upper Moscovian Epoch, Late Pennsylvanian (Late Carboniferous).
Material: Skull and skeleton.