This rare species was discovered and described 2009 (ASW). It has only been reported from a small hill near Bintulu.

The Spiny Slender Toad is a small species, males reach only 21 mm snout vent length. Males have black spines under their mandible and peculiar large warts with black spines on their sides. The skin of the back is covered with small and large tubercles. These features give the species a distinct appearance.

The natural history, tadpoles, females, and even the variations of coloration in life of the Spiny Slender Toad are still unknown.