Parent taxon: Boidae according to K. T. Smith 2013
Sister taxa: Boinae, Cadurcoboa, Candoia, Charina, Chilabothrus, Daunophis, Dawsonophis, Erycinae, Eunectes, Hechtophis, Lithophis, Messelophis, Neurodromicus, Palaeopython, Paleryx, Paraplatyspondylia, Plesiotortrix, Python, Rageophis, Rieppelophis, Totlandophis, Tropidophiinae, Tropidophis
Subtaxa: Calamagras Exiliboa Paraungaliophis Ungaliophis
Ecology: carnivore
Distribution:
• Miocene of United States (6: Delaware, Florida, South Dakota, Texas, Wyoming collections)
• Harrisonian of United States (2: Nebraska)
• Oligocene of Mongolia (1), United States (11: Colorado, Florida, Nebraska, South Dakota, Wyoming)
• Eocene of Canada (1: Saskatchewan), France (7), Kyrgyzstan (1), the United Kingdom (2), United States (5: New Mexico, North Dakota, Wyoming)
• Paleocene to Eocene of Brazil (1)
• Paleocene of Togo (1)
Total: 38 collections including 43 occurrences