Isorthoceras
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Isorthoceras rogersensis
Frey, 1995
Scale bar is 1 cm
Species
Isorthoceras albersi (Miller and Faber, 1894)
Occurrence: Point Pleasant
Reference: Frey, 1995
Formerly Orthoceras albersi
Isorthoceras rogersensis (Foerste, 1914)
Occurrence: basal Clays Ferry
Reference: Frey, 1995
Formerly Orthoceras rogersensis, Treptoceras praenuntium