|1st Species||Cyclotosaurus robustus|
|2nd Species||Cyclotosaurus mordax|
|3rd Species||Cyclotosaurus posthumus|
|4th Species||Cyclotosaurus ebrachensis|
|Time Range||230-208 mya|
|Location||Germany, England, Greenland, Poland, Russia, Thailand|
|Name Meaning||Round-eared reptile|
|Physical Dimensions||3-4.3 meters long|
Like its cousin, Mastodonsaurus, Cyclotosaurus resembled a mix between a frog, a salamander, and a crocodile. It had 4 legs, a long tail similar to that of a tadpole, a bulky body, a big, semi-flat head with big jaws, and eyes on the top of its head. Its body would have been covered in smooth skin.
Cyclotosaurus was a predator, preying mainly on fish, but also snacking on small reptiles and smaller amphibians from time to time. It had a flattened jaw that contained sharp teeth, including a few elongated teeth at the beginning of the lower jaw.
Like Mastodonsaurus, Cyclotosaurus was a front-heavy amphibian that spent all of its time in the water. Cyclotosaurus was dominantly piscivorous in its dietary habits, and would snack on small fish that came near it; however, larger species were also capable of ambushing small archosaurs that stood near the water's edge. In many places, Cyclotosaurus lived with phytosaurs, unique reptiles that bore a great resemblance to modern crocodiles. In fact, it is sometimes thought that phytosaurs were outcompeting large stereospondyls like Cyclotosaurus, due to the former being more advanced.