| Named By: | Robert R. Reisz & David Berman in 1986 |
| Time Period: | Late Carboniferous, 302 Ma |
| Location: | USA, Kansas - Stanton Formation, Rock Lake Member |
| Size: | Skull 8 centimetres long, body length around 75 centimetres |
| Diet: | Insectivore |
| Fossil(s): | Skull and partial remains |
| Classification: | | Chordata | Synapsida | Pelycosauria | Edaphosauridae | |
Ianthasaurus was a small edaphosaurid from the Late Carboniferous.