Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
The cover images in volume 213 of the journal all feature mouths and teeth from different members of the animal kingdom. Ring-tailed lemurs grace the cover of this issue of the journal. On each side of the jaw ring-tailed lemurs have two incisors, one canine tooth, three premolars, and three molar teeth on each side of the jaw. Their incisors and canines together form a toothcomb structure used during oral grooming, which involves licking and tooth-scraping. It may also be used for grasping small fruits and removing leaves from the stem when eating. The toothcomb is kept clean using a sublingual organ: a thin, flat, fibrous plate that covers a large part of the base of the tongue.