Lepilemur milanoii is a small sportive lemur with a head-body length of 22–24 cm, a tail length of 25–26 cm, a total length of 47–50 cm, and a body weight of about 720 g (Louis et al., 2006b). The pelage is notably long and thick, being generally reddish-brown on the back and grayish-white below. The head is reddish-brown dorsally but gray-brown on the face, forming a sort of mask. There is a diffuse, darker brown midline stripe on the crown, which continues down part of the back. The limbs are mainly gray (although the anterior portions of the thighs are reddish-brown), and the tail is uniformly reddish-brown (Louis et al., 2006b).
As of 2010, this species had not been studied in the wild.
Northern Madagascar. This species is currently known from the Daraina region south of the Loky River, with an additional population occurring in the Analamerana Forest. It appears to be sympatric with Lepilemur ankaranensis in the Andrafiamena Classified Forest. Field studies are needed to determine how these two species share the same forests. This is the only area where two Lepilemur species evidently occur in sympatry (Louis et al., 2006b).
There is not enough information to determine the conservation status of L. milanoii, and the latest IUCN Red List assessment (2008) classified it as Data Deficient (DD). It is known to occur in Daraina in the newly-created Loky-Manambato Protected Area, and in the Andrafiamena Classified Forest, which is slated to become a national park in the near future (Louis et al., 2006b). As of 2010, this species was not being kept in captivity (I. J. Porton, pers. comm.).
This species can be found in the forests of Daraina (Loky-Manambato Protected Area) in the Bekoroaka Parcel, as well as in the Andrafiamena Classified Forest. However, differentiating it in the latter location from sympatric L. ankaranensis is quite difficult.