Cephalopoda - Goniatitida - Girtyoceratidae
Parent taxon: Girtyocerataceae according to D. Korn and M. N. Sudar 2016
See also Furnish et al. 2009, Klug et al. 2006, Korn 2006, Korn et al. 1999, Korn and Titus 2015 and Titus 2000
Sister taxon: Entogonitidae
Subtaxa: Baschkiritidae Calygirtyoceras Girtyoceras Girtyoceratinae
Ecology: fast-moving nektonic carnivore
Distribution:
• Chesterian of United States (5: Arkansas, Nevada, Oklahoma collections)
• Carboniferous of the Czech Republic (1), Germany (4), Kazakhstan (29), Morocco (7), the Russian Federation (25), Serbia and Montenegro (1), the United Kingdom (20), United States (85: Arkansas, California, Illinois, Kentucky, Nevada, Oklahoma, Texas, Utah), Uzbekistan (7)
Total: 184 collections including 225 occurrences