Schultz's rule is a rule developed by Adolph Hans Schultz,[1] declaring a relationship between the first tooth eruption of the molar versus the permanent teeth and the progress or aging of its carrier.[2] It states that species that live longer have more wear on deciduous teeth and as a result start replacing them relatively early in life. Which is an indicator for examining fossil data. According to research, Myotragus balearicus follows Schultz's Rule.[3]