Ring-tailed lemurs have long, narrow, specialized teeth in their lower jaws that project straight forward to form a dental comb to aid in grooming.
Ring-tailed lemurs share unique dental characteristics with other members of the Superfamily Lemuroidea.
They have specialized teeth in their lower jaw that form a dental comb. These long, narrow teeth project nearly straight forward from the jaw and this specialized dentition is thought to aid in grooming.
Sources: (Cawthon Lang, 2005; Swindler 2002)
Image: Mathias Appel