• 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 (2), Australia (1), Azerbaijan (1), Belize (1), Canada (4: British Columbia, Nunavut), China (10), Croatia (1), Cuba (1), Greece (2), Indonesia (1), Iran (5), Italy (2), Japan (29), Malaysia (1), Norway (2), Oman (1), the Russian Federation (3), Slovenia (1), Tajikistan (11), Thailand (5), Turkey (7), Ukraine (2), United States (2: Kansas, Texas)

• 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 (4), Thailand (5), Turkey (7), the United Kingdom (33), United States (76: California, Idaho, Iowa, Kansas, Missouri, Nebraska, Nevada, New Mexico, Oklahoma, Texas, Wyoming)

• Devonian of Morocco (1)

Total: 300 collections including 327 occurrences