""Batrachotomus"" is a genus of prehistoric archosaur. Fossils of this animal have been found in southern Germany and dated from the Ladinian stage of the Middle Triassic period, around 228 to 231 million years ago. "Batrachotomus" was described by palaeontologist David J. Gower 22 years after its discovery.
The locality where "Batrachotomus" lived was a swampy region and the name comes from the Greek "batrachos/βάτραχος" and "tome/τομή" , which refers to its preying on the large amphibian "Mastodonsaurus". In contrast with sprawling reptiles, like crocodiles, this large carnivore was very agile with locomotor superiority due to its erect stance. A remarkable feature seen on its back was a row of paired, flattened bony plates. "Batrachotomus" was possibly an early relative of "Postosuchus", which lived during the dawn of the dinosaurs.
"Batrachotomus" was a heavily built, large quadrupedal reptile reaching 6 m in length. A trait that characterized "Batrachotomus", compared to other crurotarsans, was a series of paired small plates on its back which were attached to each vertebra. These bony deposits forming scales are called osteoderms. Flattened and leaf-shaped, these extended from behind the head along the column and reducing in size, ended at the tail. There is also evidence that osteoderms were present on the ventral region of the tail, as seen in "Ticinosuchus ferox", and even on the flank, belly and limbs.
Like other rauisuchians, "Batrachotomus" walked with an erect posture, although the limbs were not located directly under the trunk. The limbs were not equal in length as the forelimbs were about 70% of the hindlimbs. The toe bones are poorly preserved and the only well known bone is a fifth metatarsal which was hooked in shape. However, hypotheses suggest that probably each forelimb had four toes and each hindlimb five.
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