This is the highlands equivalent of the White-spotted Rock Skipper. The two species were once grouped together, but studies showed that they were distinct and non-overlapping enough to deserve separate species recognition. Unlike their other cousins the Rock Skippers, these frogs are known from relatively quiet, non-turbulent sections of streams.

I don't know who came up with the "Green-spotted" part of the English names, or what they were smoking at the time.