Acosmeryx anceus is a moth of the family Sphingidae. It was described by Caspar Stoll in 1781, and it is known from India, New Guinea, and Queensland, Australia.
The wingspan is 70–88 mm.
The larvae of subspecies subdentata have been found on plants in the genera Leea, Cayratia, Cissus, and Vitis. Larvae of ssp. anceus have been recorded on Cayratia clematidea, Cissus antarctica and Vitis vinifera.