Perrier's sifaka
…not replaced, giving the appearance of 2.1.2.32.0.2.3 despite being 2.1.2.31.1.2.3. In either case, Perrier's sifaka differs from lemurs outside of the Indriidae and Daubentoniidae families in that its toothcomb consists of four, rather than six, incisor-shaped teeth, and it has two, rather than three, permanent…