Megambonia lyoni

Hall J. (1860). Upon the fossils of the Goniatite Limestone in the Marcellus shale of the Hamilton group, in the eastern and central parts of the State of New-York, and those of the Goniatite beds of Rockford, Indiana; with some analogous forms from the Hamilton group proper. <em>Annual report of the Regents of the University of the State of New York on the State Cabinet of Natural History and the Historical and Antiquarian collection annexed thereto.</em> 13(89): 95-112.