Pelophryne murudensis is exclusively known from Gunung Murud, from where it has been described recently (Das 2008). Due to its limited range, it can be considered a rare and endangered species.

Adult males measure approx. 2.5 cm snout-vent length. The digits are swollen but not dilated. Finger I is without a free phalange; webbing on Toe V goes to tip. Subarticular tubercles are distinct.
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Only males of this species are known, all collected from montane forests, from edges of forest trails. They were found calling from leaves, 5 cm to 2 m above substrate, between 1900–2200 h. Call is a continuous trill.

The larval stages of the new Pelophryne remain unknown.