Pomacea vexillum is a South American species of freshwater snail with gills and an operculum, an aquatic gastropod mollusc in the family Ampullariidae, the apple snails.

[1] P. vexillum is considered a synonym of P. puncticulata by some authors.

[2] P. vexillum is known from Venezuela[2][3] and Guyana.

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