Pyrgocythara guarani is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.

[1] The length of the shell attains 5.5 mm.

The brownish shell shows sometimes narrow, lighter bands.

The longitudinal ribs are prominent, rounded, crenelating the suture; There are elevated revolving lines.

[2] This marine species occurs off Florida, USA, and Southeastern Brazil.