Mammalia - Cimolesta - Esthonychidae
Synonyms: Anchippodontidae Gill 1872, Tillotheriidae Marsh 1875
Parent taxon: Tillodontia according to K. D. Rose et al. 2013
See also Carroll 1988, Chow et al. 1977, Cope 1889, Gadow 1898, Gazin 1953, Hay 1902, McKenna and Bell 1997, Miyata 2007 and Rose et al. 2012
Sister taxa: Azygonyx, Basalina, Benaius, Dysnoetodon, Kuanchuanius, Lofochaius, Meiostylodon, Plethorodon, Simplodon, Yuesthonychidae
Subtaxa: Adapidium Esthonychinae Megalesthonyx Plesiesthonyx Trogosinae
Type: Esthonyx
Ecology: ground dwelling herbivore
Distribution:
• Eocene of Canada (1: British Columbia collection), China (3), France (9), India (3), Japan (3), Mexico (1), the United Kingdom (1), United States (326: California, Colorado, New Jersey, New Mexico, Utah, Virginia, Wyoming)
• Clarkforkian of United States (2: Colorado, Wyoming)
• Paleocene of United States (1: Wyoming)
Total: 350 collections including 374 occurrences