The scuirognath skull is unspecialised.
The lateral masseter muscle extends in
front of the eye onto the snout and moves the lower jaw
forward during gnawing. The deep masseter muscle is short
and only serves to close the jaw.
The cheek teeth are simple - lacking cusps or enamel ridges.
One of the two premolars is retained in each row, a primitive
feature found only in sciurognaths.
The dental formula of the Grey
Squirrel is I1/1; C 0/0; P3/2;M3/3. |