Jaws influenced Alien

Alien was pitched as Jaws in space, and that was not a critic's summary but the line used to sell it. Everything structural came with the phrase:

• The creature is withheld for most of the running time and glimpsed in pieces
• The first victim establishes the rules and is somebody the audience had started to like
• Working people in a confined vessel, arguing about money, with no authority coming
• A company or a mayor who knew and decided the risk was acceptable

The graph already holds 2001 and Dark Star pointing at Alien, for the ships and for the crew. This is where the horror grammar came from.