Ptychosyrinx is a genus of sea snails and marine gastropod mollusks in the family Turridae, the turrids.

This genus has become a synonym of Cryptogemma Dall, 1918

Species Species within the genus Ptychosyrinx include: Ptychosyrinx bisinuata (Martens, 1901): synonym of Cryptogemma praesignis (E. A. Smith, 1895) Ptychosyrinx carynae (Haas, 1949): synonym of Cryptogemma phymatias (R. B. Watson, 1886) Ptychosyrinx chilensis Berry, 1968: synonym of Thielesyrinx chilensis (S. S. Berry, 1968) Ptychosyrinx lobata (G.B. Sowerby III, 1903): synonym of Cryptogemma praesignis (E. A. Smith, 1895) Ptychosyrinx nodulosus (Gmelin, 1791): synonym of Ptychobela nodulosa (Gmelin, 1791)

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