St.John, O.H. & Worthen, A.H. (1883)
Descriptions of fossil fishes; a partial revision of the Cochliodonts and Psammodonts. Geological Survey of Illinois, 7, 55–264

St.John, O.H. & Worthen, A.H. (1875)
Palaeontolgoy of Illinois. Descriptions of fossil fishes. Geological Survey of Illinois, 6, 245–488

Newberry, J.S. & Worthen, A.H. (1870)
Geology and Palaeontology. Descriptions of fossil vertebrates. Geological Survey of Illinois, 4, 343–374

Newberry, J.S. & Worthen, A.H. (1866)
Descriptions of new species of vertebrates, mainly from the Sub-Carboniferous Limestome and Coal Measures of Illinois. Geological Survey of Illinois, 2, 9–134