Heterodonta
Distribution:
• Miocene of Italy (1 collection)
• Paleocene of Argentina (15)
• Cretaceous of Antarctica (1), Argentina (1), Peru (3), South Africa (5), South Atlantic (1)
• Jurassic of Canada (31: Alberta, British Columbia, Yukon), China (1), Germany (2), Greenland (8), India (19), Portugal (65), Spain (8), Tunisia (4), the United Kingdom (1)
• Triassic of United States (2: Nevada)
• Phanerozoic of Chile (1)
Total: 169 collections including 189 occurrences