Pterotheca

Distribution:

• Eocene of the Russian Federation (1 collection)

• Paleocene of Antarctica (17)

• Cretaceous of Antarctica (13), Canada (49: Northwest Territories, Nunavut)

• Silurian of the Czech Republic (1), Spain (1), the United Kingdom (9)

• Ordovician of Canada (16: Ontario, Quebec), the Czech Republic (1), Estonia (2), the United Kingdom (6), United States (19: Illinois, Illinois, Iowa, Indiana, Kentucky, Minnesota, Missouri, New York, Ohio, Tennessee)

Total: 135 collections including 278 occurrences

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