Mammalia - Leptictida - Leptictidae
Synonyms: Ictopsidae Schlosser 1887, Isacidae Cope 1874
Parent taxon: Leptictida according to W. A. Clemens 2015
See also Cope 1889, Gregory 1910, Hay 1902, Hay 1930, Jaekel 1911, Johnson 1966, Korth 2022, Korth et al. 2022, McKenna and Bell 1997, Meehan and Martin 2010, Novacek 1976, Novacek et al. 1985, Silcox et al. 2010, Simpson 1927, Sloan and Van Valen 1965, Van Valen 1967, Velazco et al. 2022, Velazco and Novacek 2016 and Wible et al. 2007
Sister taxa: Gypsonictopidae, Ictopsia, Pseudorhyncocyonidae
Subtaxa: Amphigyion Asioictops Blacktops Didelphodontinae Eoictops Gypsonictopinae Leptictinae Myrmecoboides Palaeictops Procerberinae Prodiacodon Pseudorhynchocyoninae Scileptictis Stenoleptictis
Type: Leptictis
Ecology: ground dwelling insectivore-carnivore
Distribution:
• Oligocene of Canada (2: Saskatchewan collections), United States (23: Colorado, Nebraska, North Dakota, South Dakota, Wyoming)
• Eocene to Oligocene of United States (2: Nebraska, South Dakota)
• Eocene of Canada (9: Northwest Territories, Saskatchewan), China (1), France (4), Portugal (1), Spain (1), the United Kingdom (3), United States (153: California, Colorado, Montana, New Mexico, North Dakota, South Dakota, Texas, Utah, Wyoming)
• Paleocene of Canada (5: Alberta, Saskatchewan), United States (63: Colorado, Montana, New Mexico, North Dakota, Texas, Utah, Wyoming)
Total: 267 collections including 331 occurrences