Final answer:
The ulnar styloid process serves as an attachment point for connective tissue and does not articulate with any bones directly. The head of the ulna, however, articulates with the ulnar notch of the radius, forming the distal radioulnar joint.
Step-by-step explanation:
The ulnar styloid process is a short bony projection located on the posterior side of the ulnar head.
This structure does not directly articulate with any bones, but instead serves as an attachment point for the fibrocartilaginous articular disc of the wrist as well as ligaments that connect the distal ends of the ulna and radius.
The distal radioulnar joint is found between the head of the ulna and the ulnar notch of the radius, not involving the ulnar styloid process itself.
While the ulnar styloid process provides structural support to the ligaments that stabilize the wrist joint, it is the head of the ulna which articulates with the ulnar notch of the radius to form the distal radioulnar joint.
This joint plays a critical role in allowing pronation and supination movements of the forearm.