The book "Wildlife of Greater Brisbane" by The QLD Museum describes the Adelotus brevis at p 225 as:
Female 40mm, male 45mm. Males have large broad heads that are about the size of the body. Back with low warts and short folds of skin; brown, olive, to slate; plain or with dark mottling; dark 'butterfly' mark usually on top of head. Belly variegated black and white; bright red patches in groin, back of legs and edges of foot.