Subfamily Ungaliophiinae McDowell 1987 (dwarf boa)

Reptilia - Squamata - Boidae

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

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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

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