Parent taxon: Spyroceratidae according to B. Kröger 2008
See also Crick 1981, Dzik and Kiselev 1995, Flower 1945, Strand 1934 and Sweet 1964
Sister taxa: Adnatoceras, Anastomoceras, Atahococeras, Bitaunioceras, Cancellspyroceras, Cryptorthoceras, Cyrtospyroceras, Cyrtothoracoceras, Diagoceras, Euloxoceras, Fusicoceras, Geisonoceroides, Gordonoceras, Lopingoceras, Palaeospyroceras, Palmeroceras, Petryoceras, Pseudocycloceras, Reticycloceras, Sceptrites, Shikhanoceras, Suloceras, Tripteroceroides
Subtaxa: Spyroceras baffinense Spyroceras bilineatum Spyroceras boreale Spyroceras chambliense Spyroceras clathratoannulatum Spyroceras crotalum Spyroceras cylindratum Spyroceras cyrtopatronus Spyroceras damesi Spyroceras ferum Spyroceras fukuijense Spyroceras giganteum Spyroceras latepatronus Spyroceras middlevillense Spyroceras olorus Spyroceras patronus Spyroceras perlaeve Spyroceras persculptum Spyroceras textumarenaceum
Type: Spyroceras crotalum
Ecology: fast-moving nektonic carnivore
Distribution:
• Devonian of Canada (1: Ontario collection), Czechia (7), Morocco (9), the Russian Federation (2), United States (62: Colorado, Indiana, New York, Pennsylvania)
• Silurian of Canada (3: Northwest Territories), Germany (2), Poland (3), United States (4: Alaska, New York)
• Whiterockian of United States (2: California)
• Chazyan of Canada (1: Quebec)
• Ordovician of Canada (28: Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Saskatchewan), Estonia (5), Greenland (1), Norway (6), United States (26: Colorado, Illinois, Iowa, Wisconsin, Indiana, Ohio, Iowa, Michigan, Minnesota, Missouri, New York, Ohio, South Dakota, Tennessee, Virginia, Wyoming)
Total: 162 collections including 183 occurrences
Specimen images are retrieved through the ePANDDA API.
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