Acrodenta is known from the holotypeMNHN ARG 506, formerly 69.Ir.1.JMD, a fragment of right maxilla. It was collected in the Douar of Irerhi locality from the Argana Formation (formerly known as the Tourbihine Member of the Ikakern Formation) of the Argana Basin, dating to the early-middle Wuchiapingian stage (or alternatively middle Tatarian stage) of the early LopingianSeries, about 260.5-255 million years ago.[1]
^Jean-Michel Dutuit (1976). "1976. Il est probable que les Rhynchocéphales sont représentés dans la faune du Trias marocain". Comptes Rendus de l'Académie des Sciences, Série D. 283: 483–486.