Pyrgocythara danae is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

(Original description) The minute shell is whitish, with a narrow brown band below the periphery in front of which the suture is laid.

The spiral sculpture consists of a strong cord at the periphery angulating the whorls, with smaller threads (sometimes alternated) covering the rest of the surface with about equal interspaces.

The axial sculpture consists of (on the body whorl 10) slightly sigmoid ribs, widest at the periphery, reaching the suture and fading out on the base, with narrower interspaces.

[2] This marine species occurs in the Sea of Cortez, Western Mexico