Ptychostylis Gabb, 1865 Turcica is a genus of sea snails, marine gastropod mollusks in the family Eucyclidae.

[2] Kano et al. (2009) have argued that Turcica belongs in the family Calliotropidae.

The whorls display transverse series of granules, the last rounded on the periphery.

The thick columella is spirally twisted posteriorly, ending anteriorly in an obtuse, prominent point.

[4] The genus ranges on both shores of the Pacific, from California and Australia northward.