Conodontophorida
Distribution:
• Carboniferous of United States (2: Montana, Utah collections)
• Devonian of Australia (1), Canada (13: Northwest Territories, Ontario, Yukon), United States (1: Montana)
• Silurian of United States (1: New York)
• Ordovician of United States (1: Tennessee)
Total: 19 collections each including a single occurrence