Alternative spelling: Erycidae
Parent taxon: Boidae according to O. Cirilli et al. 2016
See also Kuhn 1946, Kuhn 1966, Longrich et al. 2012, Maddox and Wall 1998, McDiarmid et al. 1999, McGrew et al. 1959, Noonan and Chippindale 2006, Parmley and Holman 1995, Parmley and Hunter 2010, Perrier 1928, Scanlon 2006, Szyndlar 1987, Vidal and Hedges 2002, Zerova 1989 and Zittel 1890
Sister taxa: Boinae, Cadurcoboa, Candoia, Charina, Chilabothrus, Daunophis, Dawsonophis, Eunectes, Hechtophis, Lithophis, Messelophis, Neurodromicus, Palaeopython, Paleryx, Paraplatyspondylia, Plesiotortrix, Python, Rageophis, Rieppelophis, Totlandophis, Tropidophiinae, Tropidophis, Ungaliophiinae
Subtaxa: Albaneryx Bransateryx Cadurceryx Eryx Gaimanophis Geringophis Gongylophis Huberophis Lichanura Pterygoboa Tregophis
Distribution:
• Quaternary of Greece (2 collections), Israel (2)
• Pliocene of Armenia (1), France (1), Hungary (1), Italy (1), Moldova (1), the Russian Federation (1), Turkey (1), Ukraine (2)
• Hemphillian of United States (1: Nebraska)
• Miocene of Argentina (1), China (1), France (4), Germany (3), Greece (1), Hungary (1), Iraq (1), Italy (4), Kazakhstan (3), Mongolia (1), Morocco (1), Spain (12), Ukraine (6), United States (12: Delaware, Florida, Kansas, Nebraska, South Dakota, Texas)
• Harrisonian of United States (2: Nebraska)
• Oligocene of France (5), Germany (6), United States (5: Colorado, Florida, Nebraska, Wyoming)
• Eocene of Canada (1: Northwest Territories), France (10), Pakistan (1), the United Kingdom (2), United States (2: Georgia, Wyoming)
• Cretaceous of United States (1: Montana)
Total: 100 collections including 108 occurrences