Four synapomorphies suggest that the potoroids form a monophyletic group. These are: 1) a frontal-squamosal contact; 2) an enlarged diagastric process leading to the dentary being definitely convex below the middle portion of the molar row; 3) an enlarged masseteric canal reaching anteriorly to below P 3 ; and 4) a proximoventral process on the fifth metatarsal. Gumardee pascuali and the bulungamayines Wabularoo naughtoni and Bulungamaya delicata are included within the Potoroidae because of their possession of several of these derived states. Similarities between Gumardee pascuali and Purtia mosaicus Case (1984) suggest that they may be closely related.--Modified journal abstract.

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