抄録
A trogosine tillodont, represented by seven fragmentary teeth, is described from the upper part of the Akasaki Formation, early Middle Eocene of Japan. The stratigraphic horizon of the new material is almost the same as that of the holotype of Higotherium hypsodon, which is the most recently described tillodont from Japan. In spite of poor preservation, the dental characters of the new specimens are distinguishable from those of the Asian trogosine genera including Higotherium, and they may be referable to Trogosus, which has been recorded only from the Bridgerian of North America. This Trogosus-like tillodont inhabited East Asia together with more advanced Higotherium during the early Middle Eocene.
