I only saw the film once and don't remember the lizard lady... but judging by the art you commissioned I suspect the character may have been inspired by R. Crumb's vulture demonesses.
If anybody on this board is into wacky fetish comics and they haven't checked out R. Crumb's old stuff, you're missing out!
ETA: Wow, that image was a lot bigger than I expected! Well, enjoy a great big pile of Vulture Demonesses, everybody. Happy Monday!