Atlantea tulita is a rare species of butterfly known by the common name Puerto Rico harlequin butterfly (in Spanish, mariposa arlequín de Puerto Rico or quebradillana). This brush-footed butterfly is endemic to Puerto Rico. It is a candidate for United States federal protection as an endangered species. In 2011 a report found federal protection to be warranted, but it was precluded by other actions and it remains a candidate. This butterfly has a wingspan of about 6 centimeters. The wings have a scattered harlequin pattern of orange, black, red, and white.