Gastrophrynoides borneensis is a species of frog in the family Microhylidae. It is endemic to Borneo and is known from Sarawak and Sabah in Malaysia, but it is likely to be also found in adjacent Kalimantan (Indonesia). Common name Borneo narrowmouth toad has been coined for it. Gastrophrynoides borneensis is a lowland forest species that occurs in leaf-litter of the forest floor. It is threatened by habitat loss caused by clear-cutting. References borneensis Endemic fauna of Borneo Endemic fauna of Malaysia Amphibians of Malaysia Amphibians described in 1897 Taxa named by George Albert Boulenger Taxonomy articles created by Polbot Amphibians of Borneo