Tetraclita stalactifera

Tetraclita stalactifera, the ribbed barnacle, is a species of symmetrical sessile barnacle in the family Tetraclitidae. It is found in the western Atlantic Ocean.

Subspecies
These subspecies belong to the species Tetraclita stalactifera:
 * Tetraclita stalactifera confinis Pilsbry, 1916
 * Tetraclita stalactifera stalactifera (Lamarck, 1818)