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Huge insects in general? And were the men driving a vehicle that vaguely resembled an insect or spider (wheels attached to long "struts" shaped like insect legs)?
If so, I remember the film (but not the title), but could go searching for it - I actually think that I have seen some info on it during the last year.
EDIT: Of course I don't find it when I need it, but I stumbled across this: http://en.wikipedia.org/wiki/Nausica%C3%A4_of_the_Valley_of_the_Wind_%28film%29
EDIT 2: Do a picture search for "Time Masters", I think that's the one you are looking for. It is also on youtube
Edited by 91.57.169.23

Its the 2nd time i try to figure out what the name of the movie? is i am looking for, would be great if someone has an idea. I only got a few fragments, but hope they are enough: My memory says its the style of 70/80´s western animation movies. Its in space, or at least there is a landed space-ship/capsule on a planet. There is a male captain and a male engineer with a metal plate in/ontop his head. There is a boy who befriends/tames an animal and starts riding upon it( I think it later dies). The planet is thick dangerous jungle-like. Mostly greenish/dark. Afair with branches to walk/ride upon. The most memorable scene was an attack of huge "mosquitoes" at the shore of a lake.
Any ideas? Else i have to dive more into my forgotten memories.