• Triassic of Australia (3 collections), Austria (4), India (1), Indonesia (2), Italy (1), Malaysia (1), Papua New Guinea (1), Slovakia (5), Turkey (1)

• Permian of Afghanistan (1), Armenia (9), Australia (1), Azerbaijan (7), Belize (1), Canada (4: British Columbia, Nunavut), China (10), Croatia (1), Cuba (1), Greece (2), India (3), Indonesia (1), Iran (7), Israel (1), Italy (2), Japan (39), Malaysia (2), Norway (2), Oman (1), the Russian Federation (5), Slovenia (1), Tajikistan (11), Thailand (5), Turkey (8), Ukraine (2), United States (3: Alaska, Kansas, Texas)

• Virgilian of United States (44: Idaho, Iowa, Kansas, Missouri, Nebraska, New Mexico, Oklahoma, Texas)

• Desmoinesian of United States (2: Kansas, Oklahoma)

• Westphalian of Spain (1)

• Pennsylvanian of United States (1: Texas)

• Atokan of United States (1: Wyoming)

• Osagean of United States (1: California)

• Carboniferous to Permian of the Russian Federation (3)

• Carboniferous of Afghanistan (1), Algeria (1), Austria (1), Belgium (2), Canada (3: Nunavut), France (4), Ireland (29), Italy (1), Morocco (2), Norway (3), the Russian Federation (9), Spain (3), Thailand (5), Turkey (7), the United Kingdom (34), United States (27: Kansas, Nevada, New Mexico, Oklahoma, Wyoming)

• Devonian of Morocco (1)

Total: 335 collections including 406 occurrences