Amolops siju, the Siju Cave frog, is a species of true frog found in the Siju Cave, India.[1]
It is brown with green mottling and it has dark bands on the legs. The ventral side is light with dark patches. Only 4 specimens have been collected of the species. The 3 females had an SVL of 85–94 mm (3.35–3.70 in) and the single male had an SVL of 63 mm (2.48 in), which shows a drastic size difference (sexual dimorphism).
It has only been found in Siju Cave but it is hypothesized that they migrate down there. Siju Cave is made of limestone and maintains a steady temperature and humidity, which may be attractive for a frog looking for warmth. This hypothesis is further supported by the fact that the frog has no troglobitic adaptations to life in a cave. This means that the frog might also be found outside the cave and therefore have a wider distribution.
Both the common and scientific name comes from the type locality, which is the Siju Cave.