Family Loxocemidae Cope 1861 (Mexican burrowing snake)
Reptilia - Squamata - Loxocemidae
Alternative spelling: Loxoceminae
Parent taxon: Henophidia according to N. Vidal and S. B. Hedges 2002
See also Frank and Ramus 1996, Kuhn 1966 and Smith 2013
Sister taxa: Bolyeriidae, Calabariidae, Coprophis, Helagras, Pythonidae, Xenopeltidae
Subtaxa: Ogmophis
Distribution:
• Miocene of Poland (1 collection), United States (10: Florida, Kansas, Montana, Nebraska, South Dakota, Texas, Wyoming)
• Harrisonian of United States (2: Nebraska)
• Arikareean of United States (2: Oregon)
• Oligocene of United States (2: Nebraska, Wyoming)
• Eocene of Canada (2: Saskatchewan), United States (3: Georgia, North Dakota, Wyoming)
Total: 22 collections including 23 occurrences