Cryptaulax may refer to:

• Cryptaulax (alga), 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

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