Fissurellidea patagonicaFissurellidea patagonica is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.DescriptionThe size of the shell reaches 22. 5 mm.DistributionThis species occurs in the Atlantic Ocean off Uruguay to Tierra del Fuego; off the Falklands