Classification of the genus Spyroceras
G. †Spyroceras Hyatt 1884
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†Spyroceras baffinense Schuchert 1900
†Spyroceras bilineatum Hall 1847
†Spyroceras boreale Foerste and Savage 1927
†Spyroceras chambliense Foerste 1924
†Spyroceras clathratoannulatum Roemer 1861
†Spyroceras crotalum Hall 1879
†Spyroceras cylindratum Foerste 1932
†Spyroceras cyrtopatronus Kröger 2008
†Spyroceras damesi Krause 1877
†Spyroceras ferum Billings 1866
†Spyroceras fukuijense Niko 1996
†Spyroceras giganteum Flower 1945
†Spyroceras latepatronus Kröger 2008
†Spyroceras middlevillense Foerste 1928
†Spyroceras olorus Hall 1879
†Spyroceras patronus Barrande 1866
†Spyroceras perlaeve Strand 1934
†Spyroceras persculptum Ruedemann 1926
†Spyroceras textumarenaceum Roemer 1861