 Another accessory crest, the anteroloph, is present, though small, on the first upper molar in "Lundomys", but entirely absent in both other genera.As in "Holochilus" and "Pseudoryzomys", the anterior cusp on the first lower molar, the anteroconid, contains a deep pit.Each of the three upper molars has three roots; unlike in both "Holochilus" and "Pseudoryzomys", the first upper molar lacks an accessory fourth root.