Ichthyophis monochrous  Ichthyophis monochrous, the Western Borneo caecilian or black caecilian, is a species of amphibian in the family Ichthyophiidae. It is endemic to northern Borneo and known from western Kalimantan (Indonesia) and Sarawak (Malaysia), likely occurring also in Brunei. It is a little-known species known from only a few specimens. It presumably inhabits tropical moist forest. Adults are likely subterranean. "Ichthyophis monochrous" is a moderately slender caecilian. The holotype measures in length and about in width. The head is long and has visible eyes. Tail is short (3.8 mm) but distinct. The skin has about 247 ring-shaped folds (annuli) and is strongly glandular. In life the specimen is reported to have been violet-brown in colour.)