Cryptoplax is a genus of polyplacophoran molluscs. The genus consists of the following living species:
- Cryptoplax burrowi <small>E. A. Smith, 1884</small>
- Cryptoplax caledonicus <small>Rochebrune, 1882</small>
- Cryptoplax dawydoffi <small>Leloup, 1937</small>
- Cryptoplax dimidiata <small>Ang, 1967</small>
- Cryptoplax dupuisi <small>Ashby, 1931</small>
- Cryptoplax elioti <small>Pilsbry, 1901</small>
- Cryptoplax hartmeyeri <small>Thiele, 1911</small>
- Cryptoplax iredalei <small>Ashby, 1923</small>
- Cryptoplax japonica <small>Pilsbry, 1901</small>
- Cryptoplax larvaeformis <small>Burrow, 1815</small>
- Cryptoplax mystica <small>Iredale & Hull, 1925</small>
- Cryptoplax oculata <small>Quoy & Gaimard, 1835</small>
- Cryptoplax plana <small>Ang, 1967</small>
- Cryptoplax propior <small>Is. & Iw. Taki, 1930</small>
- Cryptoplax royana <small>Iredale & Hull, 1925</small>
- Cryptoplax striata <small>Lamarck, 1819</small>
- Cryptoplax sykesi <small>Thiele, 1909</small>
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