Lottia subrugosa is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lottiidae.

[1][2] This species is found along the coasts of Brazil and Uruguay, mostly in the mid-intertidal zone.

[3] It is the most common limpet with large population sizes in the Brazilian midlittoral.

It can fill the small gaps in mussel beds dominated by Brachidontes solisianus and Brachidontes darwinianus.

[4] They are also very abundant in the regions dominated by the barnacle Tetraclita stalactifera.