Chondrichthyes - Cochliodontiformes
Parent taxon: Holocephalomorpha according to J. A. Long 2011
See also Goto and Okura 2004, Nelson 2006 and Nelson et al. 2016
Sister taxa: Chimaeriformes, Chondrenchelyiformes, Copodontiformes, Menaspiformes, Psammodontiformes, Squalorajiformes
Subtaxa: Cochliodontidae Psephodontidae Solenodus
Ecology: nektonic carnivore
Distribution:
• Permian of Japan (1 collection), Oman (5), Pakistan (8), the Russian Federation (2), Thailand (1), United States (4: Kansas, New Mexico, Wyoming)
• Atokan of United States (1: Arizona)
• Pennsylvanian of the United Kingdom (5)
• Osagean of United States (3: Indiana, Iowa)
• Mississippian of the United Kingdom (5)
• Carboniferous of Belgium (1), Egypt (1), Japan (1), the Russian Federation (2), the United Kingdom (11), United States (12: Arizona, Iowa, Kansas, Nebraska, Ohio, Pennsylvania)
• Devonian of United States (1: California)
Total: 64 collections including 103 occurrences