Probably signifera, but based on the dorsal pattern it could also be parinsignifera. Best way to confirm is to have an image of the belly. Granular grey for parinsignifera and marbled black and white for signifera.
This frog was located by call so I am confident of ID. Underside colour is interesting to know, and will keep it in mind. I am yet to have any luck sighting or photographing C. Parinsignifera.