Unique among the brown frogs of the genus Rana, the larvae of Rana sauteri have a distinctive appearance and behaviour (3). First described by Boulenger in 1909, Rana sauteri is a small-sized, brown frog (4) (5). Due to their close morphological similarities, brown frogs are notoriously difficult to distinguish (6). However, unlike most brown frogs, the digit tips of Rana sauteri have discs and horizontal grooves, an adaptation to life in fast-running water (3), earning its alternative common name of the Taiwan groove-toed frog (7).
The female Rana sauteri tends to be significantly larger than the male (8). The Rana sauteri tadpole is highly pigmented, has a flat body, large mouthparts, an abdominal sucker and a stout tail (3) (9).
- Male snout-vent length: 42 mm (2)
- Female snout-vent length: 52 mm (2)