Which muscle is located above the corners of the mouth and raises the angle of the mouth, producing a snarling expression?

The muscle that is located above the corners of the mouth and is responsible for raising the angle of the mouth, resulting in a snarling expression, is the caninus muscle. This muscle plays a key role in facial expressions, particularly in conveying emotions such as disdain or aggression. It is positioned on both sides of the face, and when it contracts, it lifts the corners of the mouth upward and outward, creating that distinctive snarling look.

In contrast, the masseter muscle is primarily involved in the chewing process, providing the force necessary to close the jaw. The platysma muscle is a thin, broad sheet of muscle that extends from the chest and shoulder muscles and moves the lower jaw and lip, but it does not have the specific function of raising the corners of the mouth. The temporalis muscle, while another important muscle for mastication, is located above the ear and is involved in elevating the jaw rather than affecting the lips. Therefore, the caninus muscle is specifically tailored for the expression described in the question.