In one scene, one of the teenagers is seen with issue #1 of "Famous Monsters of Filmland".
Paul Blaisdell had created a small makeup appliance ("about the size and weight of a postage stamp") meant to go on the live tarantula's back to make it look like it had "eerie, catlike" eyes, but this was never used.
The last of Bert I. Gordon's "giant special effects" features from the 1950s. He would not do another until 1965's "Village of the Giants."
This was filmed as "The Spider". Prior to completion, the title was changed to "Earth vs. The Spider" and that was used for the main title on the film itself. When The Fly became a blockbuster for 20th Century Fox, American International decided to ride on their success by changing the title back to simply "The Spider" on all advertising material. The main title on the film itself was never changed.