As the name denotes, this species is known from Sabah. It is earless. It lacks a tympanum, tympanic annulus, columella, and eustachian tube. The coloration is very reminiscent of Ansonia latidisca, but genetic analyses do not suggest a close relationship of the two toads. 

The head is without bony crests; parotoid glands are absent. The tips of the outer fingers are expanded into spatulate discs. The subarticular tubercles are present, but weak. The toe webbing is moderately developed. The males do not have vocal sac opening or mandibular spines. These toads are good jumpers. 

Many egges have been found in females, eggs are small and unpigmented. Tadpoles that were believed to be of this species have been described as possessing expanded mouthparts and an abdominal sucker, and the absence of upper jaw sheath. However, those early accounts could not be confirmed and have not been verified by modern DNA barcoding techniques.

These toads have not often been encountered in their habitats. The photos presented here were kindly provided by ©Chien Lee (www.chienclee.com) and ©Kurt Orion G (https://www.facebook.com/orionmysterymacro/). Chien Lee's specimen was found at Mt. Kinabalu at 1.041 m a.s.l. It perched 1.5 m above ground on vegetation, 100-200 away from the nearest river. Kurt reported S. maculatus from Tawau Hills Natl. Park.