Giganteopalpus is a monotypic moth genus in the family Sphingidae first described by Adolph Huwe in 1895. Its only species, Giganteopalpus mirabilis, described by Walter Rothschild in 1895, is known from Sundaland.[1]
It is very similar to Eurypteryx species, but differs in the enlarged labial palps, the second segment of which is broader than long, and the costal margin of the hindwing having a prominent antemedian lobe.
The larvae possibly feed on Araceae species.