What is "rousettus"

Rousettus is a genus of Old World fruit bats or megabats. They are sometimes referred to as dog-faced fruit bats, or flying foxes. The genus is a member of the suborder Megachiroptera. The genus consists of ten species that range over most of Africa to southeast Asia, and the islands of the south Pacific. They are noteworthy for being the only megabats capable of echolocation.