The Mauritian little mastiff bat is restricted to Mauritius. It is nocturnal and roosts in lava tunnels; isolated records from coastal South Africa are treated as vagrants.
Its dorsal fur is short and uniformly dark brown, becoming paler on the abdomen. The ears are small, upright, triangular, and spaced apart at their bases.
It is nocturnal and roosts in lava tunnels on Mauritius. The treatment describes only a few known roosting sites; its diet and breeding are unknown.
An extinction-risk assessment has not been added yet.