• Permian to Triassic of India (2 collections)

• Permian of Afghanistan (2), Australia (9), Azerbaijan (1), Bhutan (1), Bolivia (12), Cambodia (1), Canada (38: British Columbia, Northwest Territories, Nunavut, Yukon), Chile (4), China (40), Croatia (1), Greece (1), Greenland (16), India (14), Indonesia (3), Japan (23), Madagascar (1), Malaysia (3), Mexico (2), Mongolia (8), Myanmar (1), Nepal (16), New Zealand (2), Oman (2), Pakistan (132), Peru (2), the Russian Federation (27), Svalbard and Jan Mayen (11), the United Arab Emirates (1), United States (93: Alaska, Arizona, California, Oregon, Texas, Utah)

• Carboniferous of Australia (15), Bolivia (1), Canada (1: Nunavut), China (1), India (1), Iran (2), Svalbard and Jan Mayen (1), United States (8: Alaska, Nevada, Texas)

Total: 499 collections including 564 occurrences