see text Cantao is a genus of true bugs in family Scutelleridae[1][2] and tribe Scutellerini.

[3] Body elongate oval; head elongate, with nearly straight and carinate lateral margins; pronotum with posterolateral angles produced at base of scutellum; scutellum with a pair of deep foveae basally; peritreme large, occupying most of metapleurite, evaporatorium reduced.

[2] Distributed in Indomalaya, Wallacea, New Guinea and Australia.

A doubtful species (Cantao africanus) has been reported from tropical Africa.

A fossil species (tentatively placed into Cantao) was described from the middle Miocene of Tottori Prefecture, Honshu, Japan.