Stauffer, C. R.; Schroyer, C. R. (1920). The Dunkard Series of Ohio. <em>Geological Survey of Ohio Bulletin, fourth series.</em> 22: 1-167. page(s): 144, pl. 11 (not 18), fig. 9 [details]
original descriptionStauffer, C. R.; Schroyer, C. R. (1920). The Dunkard Series of Ohio. <em>Geological Survey of Ohio Bulletin, fourth series.</em> 22: 1-167. page(s): 144, pl. 11 (not 18), fig. 9 [details]
Present Inaccurate Introduced: alien Containing type locality
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