High Quality Content by WIKIPEDIA articles! Atlantis is a fictional location in the DC Comics Universe. The very first DC Universe version of Atlantis debuted in Action Comics #18 (November 1939), and was created by Gardner F. Fox and Fred Guardineer. Other versions appeared in various DC comics in the 1940s and 1950s, including the version in the Superman group of books in which the mermaid Lori Lemaris resides. Aquaman`s version of the city, the most prominently featured version in the company`s line, first appeared in Adventure Comics #260 (May 1959), and was created by Robert Bernstein and Ramona Fradon. All versions are based on the mythical island of Atlantis first mentioned in Plato`s initial dialogue the Timaeus, written circa 360 BC.