| Named By: | D. S. Berman, A. C. Henrici, T. Martens, S. S. Sumida & J. S. Anderson in 2011 |
| Time Period: | Early Permian, 284-279.5 Ma |
| Location: | Germany - Tambach Formation |
| Size: | Unavailable |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Almost complete skull and lowers jaws, as well as partial post cranial skeletal remains |
| Classification: | | Chordata | Amphibia | Temnospondyli | Trematopidae | |
Rotaryus is an extinct genus of Early Permian trematopid dissorophoid temnospondyl known from the Free State of Thuringia of central Germany.