Family Mastixiaceae Calestani 1905
Sister taxa: none
Subtaxa: Beckettia Mastixia Mastixioid Mastixiopsis
Distribution:
• Miocene of Germany (23 collections), Poland (1)
• Oligocene of Germany (8), the United Kingdom (1)
• Eocene of Germany (2), the United Kingdom (9), United States (2: Oregon, Virginia)
Total: 46 collections including 54 occurrences