The fovea inferior anguli oris, also known as the fovea sublinguais, refers to a small depression located at the corner of the mouth, specifically under the lower lip near the angle of the mandible. While it may not be a commonly discussed anatomical feature, it is not considered to be a rare occurrence. Many individuals possess this anatomical variation, and its prominence can vary from person to person.
In the general population, anatomical variations are quite common, and the presence of the fovea inferior anguli oris is just one of many small features that can differ among people. Its visibility or distinctiveness may change based on factors such as individual muscle tone, fat distribution, and age. Therefore, while some might not notice it, it exists in a large number of individuals, making it a normal anatomical feature rather than a rarity.