Ichthyophis monochrous
It is endemic to northern Borneo and known from western Kalimantan ( Indonesia ) and Sarawak ( Malaysia ) , likely occurring also in Brunei . 
<triplet> Kalimantan <subj> Indonesia <obj> country <triplet> Sarawak <subj> Malaysia <obj> country <triplet> Malaysia <subj> Sarawak <obj> contains administrative territorial entity <triplet> Brunei <subj> Borneo <obj> located on terrain feature