TAXONOMY AND DISTRIBUTION OF DAEODON, AN OLIGOCENE-MIOCENE ENTELODONT(MAMMALIA, ARTIODACTYLA) FROM NORTH-AMERICA

Dinohyms Peterson, 1906, the widely used generic name of the giant Oli gocene-Miocene entelodont from North America, is a junior subjective s ynonym of Daeodon Cope, 1879. Ammodon Marsh, 1893 also is a junior sub jective synonym of Daeodon. Five species have been named that we assig n to Daeodon; D. shoshonensis Cope, 1879, D. leidyanus (Marsh, 1893), D. mento (Allen, 1926), D. hollandi (Peterson, 1905b), and D. minor (L oomis, 1932), and we tentatively consider all to represent a single sp ecies, D. shoshonensis Cope, 1879. The type material of D. leidyanus, from the basal Kirkwood Formation near Farmingdale, New Jersey is of e arly Miocene (late Arikareean) age. Other Daeodon occurrences range in age from late Oligocene (Arikareean) to early Miocene (Hemingfordian) .