Herpetotheriinae
Distribution:
• Miocene of United States (1: Texas collection)
• Arikareean of United States (4: Montana, Nebraska)
• Oligocene of United States (1: Colorado)
• Eocene of Pakistan (1), Switzerland (1), Turkey (1), the United Kingdom (1), United States (6: Colorado, Wyoming)
Total: 16 collections each including a single occurrence