I don't know the name of the movie, but a few scens. The crew is on a alien planet, there is a door to a place on the surface of the planet but can't get through it so they decide to go through a hole or a well of some sort. One the crew member tries to go through the well but is suddenly attacked from all sides from a kind of suction tantecles that attaches itselfs to the persons and starts sucking him. Another scene was that one of crew members hands gets stuck in the door and gets separated from the body and that hand then grabs a piece of glass or a star and throws it at him which causes to die.

Thanks

It's Galaxy of Terror (1981) (http://www.imdb.com/title/tt0082431/)