Lungfish Burrows from the Michigan Coal Basin

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Science  14 May 1965:
Vol. 148, Issue 3672, pp. 963-964
DOI: 10.1126/science.148.3672.963


Five casts of lungfish burrows have been found in a quarry near Grand Ledge, Michigan, in shale of the Saginaw group, Middle Pennsylvanian. The burrows contain no fish remains, but they closely resemble lungfish burrows from the Lower Permian of Texas which contain remains of the genus Gnathorhiza.