Ichnospecies: belli BRANSON & MEHL, 1932
Etymology:

Holotype: University of Missouri, 595 V. P.

Locality: Sheep Mountain, 30 miles southeast of Lander, Fremount County, Wyoming.

Horizon: Tensleep sandstone.

Biostratigraphy:

Age: Pennsylvanian.

Material: A slab marked by a consecutive series of 24 prints of right and left hind feet and a few indifferently preserved prints of the forefeet. The prints are of an animal walking in a straight line. Both manus and pes are pendactyle, with pes webbed.