Mammalia - Tribosphenida - Phenacodontidae
Synonyms: Gidleyina Simpson 1935, Prosthecion Patterson and West 1973
Parent taxon: Meniscotheriidae according to Cope 1882
See also Archibald 1998, Carroll 1988, Hay 1902, Patterson and West 1973, Rose et al. 2012, Schiebout 1974, Simpson 1935, Thewissen 1990, West 1971 and Winterfeld 1982
Sister taxon: Meniscotherium
Subtaxa: Ectocion cedrus Ectocion collinus Ectocion ignotum Ectocion major Ectocion mediotuber Ectocion nanabeensis Ectocion osbornianus Ectocion parvus Ectocion superstes
Type: Oligotomus osbornianus
Ecology: ground dwelling herbivore
Distribution:
• Eocene of Mexico (1 collection), United States (145: Colorado, Mississippi, Wyoming)
• Cf2 of United States (2: Wyoming)
• Cf3 of United States (2: Wyoming)
• Cf1 of United States (1: Wyoming)
• Clarkforkian of United States (150: Colorado, Wyoming)
• Paleocene to Eocene of United States (1: Wyoming)
• Paleocene of Canada (12: Alberta, Saskatchewan), United States (81: Colorado, Montana, North Dakota, Wyoming)
Total: 395 collections including 402 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.