Original: It has sometimes been considered synonymous with Pipistrellus tenuis; however, revisions of the genus based on baculum have identified Pipistrellus murrayi as a distinct species.
Simplified: It was thought to be the same as the Pipistrellus tenuis, but new research on the bat's baculum, (a penis bone), has shown that Pipistrellus murrayi is a different species.