Cryptophasa atecmarta is a moth in the Xyloryctidae family. It was described by Turner in 1917. It is found in Australia, where it has been recorded from New South Wales, Queensland and Western Australia. The wingspan is about 32 mm. The forewings are grey with sparse fuscous irroration and indistinct markings. There is a fuscous dot in the disc at one-fourth, a second in the middle and a third at three-fourths. This last dot forms the apex of a darker shape, the terminal area being paler grey. The hindwings are pale fuscous. The larvae bore the stem of Hakea leucoptera.