Ib Jørgen Melchior was a Danish-American novelist, short-story writer, film producer, film director, and screenwriter of low-budget American science fiction movies, most of them released by American International Pictures.

Reptilicus is a 1961 Danish-American monster film about a prehistoric reptile. The film was produced by Cinemagic and Saga Studio and separate versions were released in Denmark and in the United States, with American International Pictures handling distribution for the latter.