Alcadia pellucida is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae.
Description (Original description in Latin) The shell is similar to Helicina zephyrina Duclos, 1833, but with the columella nearly straight and somewhat angular.
A more transparent shell than Helicina zephyrina, with the columella nearly straight, and joining the outer lip at an angle.
Distribution This species occurs in French Guiana.
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