Michrystridium
Distribution:
• Cretaceous of Antarctica (2 collections), Egypt (31)
• Jurassic of Argentina (1)
• Triassic of Madagascar (1), Norway (6), Poland (2)
• Rotliegendes of Norway (2)
• Permian of Germany (4), Norway (1), Poland (7)
• Devonian of Turkey (1)
• Ordovician of Serbia and Montenegro (1)
• Cambrian of the Russian Federation (1)
Total: 60 collections including 81 occurrences