Cephalopoda - Pseudorthocerida - Pseudorthoceratidae

Alternative combination: Orthoceras knoxensis

Synonyms: Mooreoceras normale Miller et al. 1933, Orthoceras cribrosum Geinitz 1866, Orthoceras rushensis Meek and Worthen 1873, Pseudorthoceras seminolense Girty 1911, Pseudorthoceras splendens Clifton 1942

Full reference: A. M. McChesney. 1859. Descriptions of new species of fossils from the Paleozoic rocks of the western states. Transactions of the Chicago Academy of Sciences 1:1-76

Belongs to Pseudorthoceras according to B. Kröger and R. H. Mapes 2005

Sister taxa: Pseudorthoceras neumannae, Pseudorthoceras pillae, Pseudorthoceras simense, Mooreoceras sibumasuense, Mooreoceras giganteum, Mooreoceras australis

Average measurements (in mm): shell 9.50 x 7.50