TABLE 1. The status of the relevant taxonomic characters (column) in Mourasuchus in each of the species of the genus (row).
| Characters/Species | M. amazonensis | M. arendsi | M. atopus | M. pattersoni |
| Size of the external naris | Wider than long | Circular | Circular | Wider than long |
| Shape of the incisive foramen | Tri-lobed | Reversed tear-drop? | Not preserved | Circular |
| Lateromedial shape of the palatines | Wide? | Wide? | Constricted | Constricted |
| Shape of the jugals (lateromedially/dorsoventrally) | Wide/Flattened | Slender/Low | Slender/Low | Wide/High |
| Squamosal eminences | ? | Present | Not preserved | Not preserved |
