The lower incisors and canines have become incisiform and constitute the 'dental comb' or 'tooth-comb' because they are placed close to each other and are horizontally and forwardly elongated. In fact, the comparison with a comb is not justified, because although these teeth are often used for grooming, they serve in the first place to grab food and it is probable that only this use corresponds with the selective factor. Indeed, Eulemur can attack very hard fruits and scrape of bark to obtain gums of which they feed to some degree, at least during dry periods or when fruits are rare, thanks to the dental comb. This dental protrusion of lower teeth takes place with the young, as is observed with most of the lemurs, from the first week onwards, when these teeth are well grown but vertical at birth.
In all species with a 'dental comb', the first visible lower premolars (P2) are caniniform, and thus take over the functions of the canines that are incorporated in the comb. The lower premolars fit behind the upper canines if the mouth is closed. This is the inverse of the classical arrangement of real canines.

Alternative form for tooth comb : dental comb.