Cephalopoda - Pseudorthocerida - Spyroceratidae
Alternative spelling: Spyroceratinae
Parent taxon: Pseudorthocerida according to B. Kröger 2008
See also Chen et al. 1981, Flower 1962, Niko et al. 2000, Sweet 1964 and Ulrich et al. 1944
Sister taxa: Pseudorthoceratidae, Trematoceratidae
Subtaxa: Adnatoceras Anastomoceras Atahococeras Bitaunioceras Cancellspyroceras Cryptorthoceras Cyrtospyroceras Cyrtothoracoceras Diagoceras Euloxoceras Fusicoceras Geisonoceroides Gordonoceras Lopingoceras Palaeospyroceras Palmeroceras Petryoceras Pseudocycloceras Reticycloceras Sceptrites Shikhanoceras Spyroceras Suloceras Tripteroceroides
Ecology: fast-moving nektonic carnivore
Distribution:
• Permian of Azerbaijan (8 collections), China (40), East Timor (1), Greece (1), Iran (8), Italy (3), Japan (2), Mexico (6), Oman (1), Tajikistan (5), United States (1: Texas)
• Carboniferous to Permian of Japan (1)
• Carboniferous of Argentina (1), the Czech Republic (1), Kazakhstan (1), the Russian Federation (1), the United Kingdom (3), United States (75: Alabama, Arkansas, Nevada, Oklahoma, Texas)
• Devonian of Canada (1: Ontario), the Czech Republic (10), Kyrgyzstan (1), Morocco (11), the Russian Federation (2), United States (62: Colorado, Indiana, New York, Pennsylvania)
• Silurian of Canada (3: Northwest Territories), China (1), the Czech Republic (1), Germany (2), Italy (4), Poland (3), United States (4: Alaska, New York)
• Chazyan of Canada (1: Quebec)
• Whiterockian of United States (2: California)
• Ordovician of Canada (28: Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Saskatchewan), Estonia (5), Greenland (1), Norway (6), United States (25: Colorado, Illinois, Iowa, Wisconsin, Indiana, Ohio, Iowa, Michigan, Minnesota, Missouri, New York, Ohio, South Dakota, Tennessee, Virginia, Wyoming)
Total: 332 collections including 396 occurrences