| There is a knoblike process on the crest at a point three fourths the length of the baculum from its base. |
| Hamilton figured and described the baculum of 11 species of North American microtines. |
| The males have a well-developed baculum with a total length of around 72 mm. |
| Like some other mammal taxa, but unlike rabbits and other lagomorphs, male rodents have a baculum. |
| There the species differ in color, in the shape of the skull, and in the size and shape of the baculum. |
| The baculum in Glaucomys is the most distinctive of that of any American sciurid. |
