Phanoptis donahuei is a moth of the family Notodontidae. It is found in southern Mexico.
The length of the forewings is 20âÂÂ21.5 mm for males and 22.5âÂÂ24 mm for females.
The species name honors Julian P. Donahue, curator emeritus of the entomology department at the Natural History Museum of Los Angeles County.