There is a white or grey, slightly elongated blotch located on the midline within this mark.

The warts are slightly paler, and there is a pale patch on the midline, just behind the pectoral girdle.

[3] Amietia hymenopus inhabit high-altitude riverine grasslands at elevations of 1,800–3,000 m (5,900–9,800 ft) above sea level.

Breeding takes place throughout the year in seepage areas on rocky stream banks or near the edges of pools.

Drying of streams and severe freezing in winter can cause large die-offs of tadpoles.