Spirorbidae
Distribution:
• Miocene of Spain (1 collection)
• Cretaceous of France (1)
• Triassic of United States (2: New Mexico, Texas)
• Carboniferous of Canada (1: Newfoundland and Labrador), the United Kingdom (1)
• Devonian of Australia (2)
• Silurian of Estonia (1), United States (1: Wisconsin)
Total: 10 collections each including a single occurrence