The kernel apex can take different shapes&colon; smooth, horned, cuspidate, rostrum-like or indented. The skull is robust and the molars are low-crowned and cuspidate. The incisors are curved and pincer-like, and the molars are simple and cuspidate. As is typical of "Macrotarsomys", the molars are cuspidate and low-crowned. Its main diagnostic characters are its cuspidate spikelets and broad elliptic nutlets.