The Fly River roundleaf bat (Hipposideros muscinus ) is a species of bat in the family Hipposideridae. It is found in West Papua, Indonesia and Papua New Guinea.
Based on two individuals, Thomas and Doria noted that the Fly River roundleaf bat has a head and body length of 44–52 mm (1.7–2.0 in); a tail length of 23 mm (0.91 in); and a forearm length of 45–47 mm (1.8–1.9 in).
The Fly River roundleaf bat is found only on the island of New Guinea, where its range includes both Indonesia and Papua New Guinea.It has been documented at a range of elevations from 0–750 m (0–2,461 ft) above sea level.It is found in forested habitat.
As of 2017, the Fly River roundleaf bat is evaluated as a least-concern species by the IUCN—its lowest conservation priority.It meets the criteria for this classification because it has a relatively wide geographic range and its lowland habitat is mostly intact.
