Cryptaulax

Cryptaulax may refer to:
 * Cryptaulax (cryptomonad), a genus of Cryptomonadales in the family Cryptomonadaceae
 * †Cryptaulax (gastropod), (†Cryptaulax Tate, 1869), the type genus of the subfamily Cryptaulacinae, when considered valid, otherwise an extinct genus in the family Procerithiidae and subfamily Procerithiinae
 * Cryptaulax (wasp) (Cryptaulax Camoron, 1906), a genus of wasps in the subfamily Gelinae