Most of the edge of each temporal notch is formed by the curved supratemporal bone rather than the squamosal, similar to baphetids but unlike Balanerpeton. Each supratemporal contacts a postparietal at the rear edge of the skull, a plesiomorphic feature in contrast to "anthracosaurs" which allow the parietal and tabular bones to contact instead.
The majority of the temporal notch's edge is created by the curved supratemporal bone rather than the squamosal, mirroring baphetids but diverging from Balanerpeton. The supratemporal bone also connects with a postparietal at the skull's rear edge, a primitive trait in contrast to "anthracosaurs" which enable the parietal and tabular bones to make contact.