Species: obsoletus COPE, 1875
Syntypes: AMNH 6831 and Columbia University.
Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.
Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.
Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).
Material: Both upper and lower jaws of skulls.
Syntype: Columbia University: Natural mould of jaw ramus and maxillary region with teeth and tusks.
WITZMANN, ERNEBURG & MILNER, 2017
MB.Am.49: Parial skull roof.