• Permian of United States (1: Texas collection)

• Carboniferous to Permian of United States (1: Texas)

• Uhaku of Estonia (2), the Russian Federation (1)

• Aluoja of Estonia (3), the Russian Federation (1)

• Chazyan of Canada (2: Quebec), United States (13: Alabama, New York, Tennessee, Virginia)

• Whiterockian of United States (4: Nevada)

• Vaana of Estonia (1)

• Hunderum of Sweden (1)

• Valaste of Estonia (3), the Russian Federation (4)

• Billingen of the Russian Federation (5)

• Arenig of Argentina (1), China (1), the United Kingdom (2)

• Dawan of China (1)

• Ordovician to Silurian of Canada (3: Québec)

• Ordovician of Australia (1), Belarus (4), Belgium (8), Canada (24: Newfoundland, Ontario, Quebec), China (15), Estonia (152), Iran (1), Ireland (6), Latvia (3), Lithuania (6), Mongolia (1), Myanmar (1), Norway (8), Poland (1), the Russian Federation (194), Sweden (7), Ukraine (1), the United Kingdom (31), United States (16: Illinois, Iowa, Minnesota, Missouri, Oklahoma, Tennessee, Virginia)

• Cambrian of Australia (1), Kyrgyzstan (2), Spain (2)

• Solvan of Australia (1), United States (1: Alaska)

Total: 537 collections including 698 occurrences