Nyctibatrachus mewasinghi

N. mewasinghi is a small frog, with a snout–vent length of 21.9–22.3 mm (0.86–0.88 in) for adult males and 21.4–23 mm (0.84–0.91 in) for females. The width and length of the head are similar, and the snout is ovoid and longer than the diameter of the eye. Males can be distinguished from females by the presence of a prominent femoral gland (a bulbous gland near the inner thigh). In adult females, the upperside is light greyish-brown, with a pair of light reddish-brown bands running from behind the eyelids to the middle of the back. The snout has a triangular light brown patch, demarcated by a dark stripe between the eyes. The margins of the upper and lower jaws are grayish, with glandular projections on the lower jaw. The side of the body is slightly lighter than the back, and the underside is mainly off-white, with some scattered greyish-brown spots on the throat. The limbs are light brown with horizontal dark brown bands above and off-white with scattered greyish-brown spots below. The fingers and toes are dark grey, with dark brown bands across the upper side. When preserved in 70% ethanol, the frog has a more faded colour and the bands along the back are cream to light brown. N. …

N. mewasinghi is endemic to the Western Ghats of India, where it is known only from the Malabar Wildlife Sanctuary in Kerala, north of the Palakkad Gap. The specimens used to describe the species were collected from a stream with plant cover, running alongside a wall ahead of a drain releasing excess water from the Peruvannamuzhi Dam, and were at an elevation of 38 m (125 ft). Males have been observed vocalising from rocks and leaves around 5:00 PM. The species has not yet been assessed by the IUCN.

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