Thalassodes is a genus of moths in the family Geometridae first described by Achille Guenée in 1857.

Palpi with second joint clothed with hair and reaching the apex of the short frontal tuft.

Antennae of male usually bipectinate (comb like on both sides) to two-thirds length.

Hind tibia usually dilated with a fold containing a tuft of long hair.

Hindwings with angled or produced outer margin to a point at vein 4.