Leptolalax pictus Painted Slender Litter Frog
Some authorities have now lumped Leptolalax in with Leptobrachella. My go-to Borneo references haven't done that yet, so I'm leaving them distinct for now.
near Poring, Sabah, MalaysiaMarch 1, 2018
Painted Slender Litter Frog (Leptolalax pictus)
Dramatic specimens of this species have lots of white-bordered dark blotches on the head and body. Less dramatic ones like this have a few such blotches. In the same area can also be found L. fritinniens, which is nearly identical in shape and size but lacks the white-bordered dark blotches. It's not easy ID'ing hundreds of frogs after a trip to Borneo!
Online references:
Printed references: