MolluscaBase source details
Unklesbay, A. G. (1962). Pennsylvanian cephalopods of Oklahoma. Oklahoma Geological Survey, Bulletin. 96: 1‒150, pls 1‒19.
489920
Unklesbay, A. G.
1962
Pennsylvanian cephalopods of Oklahoma
Oklahoma Geological Survey, Bulletin
96: 1‒150, pls 1‒19
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Michelinoceras directum Unklesbay, 1962 † accepted as Smithorthoceras unicamera (H. J. Smith, 1938) † (original description)
