Oedaleops campi (Langston 1965) Asselian, Earliest Permian ~295 mya, ~7 cm skull length, was derived from a sister to Milleretta RC70 and was a sister to Eothyris and Casea. That was a sister to the clade that included Feeserpeton and Australothyris.
Distinct from Milleretta, the skull of Oedaleops had a flatter shape with a larger naris and a taller, less pointed rostrum. The nasal was arrow-shaped. The pineal opening was relatively very large. The prefrontal and postfrontal were closer together. A large lateral temporal fenestra embayed the jugal and squamosal. The supratemporal was larger and overhung the posterior skull.