Species: mazonensis MOODIE, 1912
Etymology:

Holotype: YPM 799 (222)

Locality: Mazon Creek, 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: Scapula, radius and ulna, humerus, clavicle, portion of the coracoid, from the right side.