• Carboniferous of Australia (16 collections), Canada (1: Alberta), China (6), Germany (3), Ireland (1), Libya (2), Mexico (2), the United Kingdom (9), United States (33: Illinois, Indiana, Missouri, Montana, Nevada, Texas)

• Givetian of United States (1: Missouri)

• Devonian of Afghanistan (2), Belgium (1), Brazil (8), Canada (40: Alberta, Alberta, Saskatchewan, Mackenzie, Manitoba, Northwest Territories, Ontario), China (6), Colombia (26), France (10), Germany (23), Iran (7), Libya (8), Mauritania (3), Poland (11), the Russian Federation (7), Spain (4), United States (863: Alaska, Illinois, Indiana, Iowa, Maryland, West Virginia, Virginia, Michigan, Missouri, Montana, Nevada, New Mexico, New York, Ohio, Pennsylvania, Virginia, West Virginia, Wisconsin), Venezuela (4), Vietnam (1)

Total: 1098 collections including 1269 occurrences