"Megabalanus" "tintinnabulum" is found worldwide and has been described on this site. Like other acorn barnacles, "M. tintinnabulum" is a filter feeder. When Carl Linnaeus first described this species in 1758, he named it "Balanus tintinnabulum". The tessellated blenny lives inside an empty shell of the large barnacle, "Megabalanus tintinnabulum". Megabalanus tintinnabulum is a species of large barnacle in the family Balanidae. Mycena tintinnabulum is a European species of agaric fungus in the family Mycenaceae.