Gephyromantis luteus were abundant and noisy at night on Nosy Mangabe.
Gephyromantis luteus found at night next to a stream near the dam close to camp at Farankaraina.
I haven't seen this two-toned pattern described or pictured for G. luteus, but this specimen otherwise seems to match the description of that species.
Gephyromantis luteus found in bamboo forest next to popular tourist trail in Ranomafana National Park, Madagascar. Location estimated.
Gephyromantis luteus in Marojejy National Park. Location estimated.