Triadobatrachus

Triadobatrachus is an extinct genus of early amphibians that lived during the Early Triassic period, approximately 251 to 245 million years ago. It is considered one of the earliest known frogs. Fossils of Triadobatrachus have been found in Madagascar.

This ancient amphibian was relatively small, with an estimated length of about 10 cm (4 inches). It possessed some characteristics of modern frogs, such as a broad head and hind limbs that were likely adapted for jumping, though not as developed as in later species. However, it also retained some primitive features, including a longer body and more vertebrae than modern frogs, and a tail that was not yet reduced to a urostyle. The discovery of Triadobatrachus provides crucial insights into the evolutionary transition from earlier tetrapods to the diverse amphibian life seen today.12