Pseudorthoceras knoxense McChesney 1859 (mollusk)

Cephalopoda - Pseudorthocerida - Pseudorthoceratidae

Alternative combination: Orthoceras knoxensis

Invalid subtaxa: Mooreoceras normale Miller et al. 1933, Orthoceras colletti Morse 1931 [replaced name], 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

See also Clifton 1942, Gordon 1964, Hoare 1961, Miller et al. 1933, Miller and Thomas 1936, Miller and Youngquist 1947, Miller and Youngquist 1949, Morse 1931, Unklesbay and Palmer 1958 and Winters 1963

Sister taxa: Pseudorthoceras neumannae, Pseudorthoceras pillae, Pseudorthoceras simense, Pseudorthoceras stonense, Mooreoceras regulare, Mooreoceras tuba, Mooreoceras wedingtonianum, Mooreoceras zalazarensis, Mooreoceras australis, Mooreoceras giganteum, Mooreoceras sibumasuense

Subtaxa: Mooreoceras normale angusticameratum

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Ecology: fast-moving nektonic carnivore

Distribution:

• Permian of Azerbaijan (2 collections), United States (13: Arizona, Kansas, Texas, Wyoming)

• Carboniferous of the United Kingdom (17), United States (150: Arkansas, Illinois, Kansas, Kentucky, Maryland, Missouri, New Mexico, Ohio, Oklahoma, Texas)

Total: 182 collections including 198 occurrences

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