Temporal range: Middle Jurassic
It is known from various dental and mandibular remains. These were discovered in the shale fields of Oxfordshire in the United Kingdom. The dental formula of the mandible is 4:1:4:5. The premolars are symmetrical and the crowns look like tricusped molars, with the central cusp being largest in premolars and molars, though the size difference is less great in the premolars. George Gaylord Simpson (1928, p. 71) noted that the teeth of Amphilestes are diagnosable in having “molar cusps high and slender, molar cingulum rising below the main cusp, molar enamel not pitted."
- Butler, P.M. and Sigogneau-Russell, D. 2016. Diversity of triconodonts in the Middle Jurassic of Great Britain. Palaeontologia Polonica 67, 35–65. LSID urn:lsid:zoobank.org: pub: C4D90BB6-A001-4DDB-890E-2061B4793992