Marmota

1. infraorbital foramen passes between zygomatic plate and side of rostrum
2. dorsal profile almost straight, slightly depressed between postorbital processes
3. postorbital processes of frontals approximately at right angles to main axis of skull
4. skull broad, flattened dorsally
5. 22 teeth (DF = 1/1, 0/0, 2/1, 3/3)