• Triassic of China (5 collections)

• Permian to Triassic of China (1)

• Permian of Afghanistan (3), Armenia (8), Australia (80), Azerbaijan (6), Bolivia (15), Canada (6: British Columbia, Northwest Territories, Yukon), China (270), Greece (1), Guatemala (1), India (2), Indonesia (3), Iran (15), Japan (14), Laos (1), Malaysia (8), Mexico (2), Myanmar (3), Nepal (14), New Zealand (4), Oman (16), Pakistan (73), Peru (1), the Russian Federation (15), Slovenia (1), South Korea (1), Svalbard and Jan Mayen (3), Tajikistan (1), Thailand (23), Turkey (3), Ukraine (20), the United Kingdom (3), United States (110: Alaska, Kansas, Nevada, Texas, Utah)

• Carboniferous to Permian of United States (16: California, Texas)

• Carboniferous of Argentina (2), Australia (6), Bolivia (6), Canada (2: Alberta), China (1), Ireland (3), Malaysia (1), Mexico (1), the Russian Federation (5), Ukraine (1), the United Kingdom (19), United States (290: Alaska, Arkansas, California, Colorado, Illinois, Iowa, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, Utah)

• Devonian of Afghanistan (1), Germany (10), the Russian Federation (1)

Total: 1097 collections including 1306 occurrences