Species of
Voalavo are small rodents with a delicate skull and without a tuft at the tip of the tail (as present in the closely related genus
Eliurus). The eastern voalavo is similar to the northern voalavo and differs only in subtle characters. In both species, the final of the tail are covered with white hairs. In three specimens of eastern voalavo, head and body length ranges from , tail length is , hindfoot length , ear length , and body mass . The back end of the
incisive foramina (openings in the front part of the
palate), which is located in front of the first molars, is rounded in eastern voalavo, but angular in northern voalavo. The
sutures of the
maxillary and
palatine bones (the line where the two bones, part of the skull, join) are straight and parallel to each other, the toothrows, and the midline of the skull in eastern voalavo. Northern voalavo, in contrast, are more curved. Statistical analysis of measurements of the skull and teeth clearly separates the two species of
Voalavo. ==Distribution and ecology==