H.R. Giger
Probably you have already discussed but this creatures look like inspired by H.R. Giger paintings, sculptures http://en.wikipedia.org/wiki/H._R._Giger
The Weird 13
http://mostlyfatal.com/
I was going to agree based on the first picture I saw, but then I realized it was just a picture of the artist.
Then I saw some other stuff and I realized I'd seen this before. At school, there was a class or something you could sign up for and it was about some of his work.
Interesting.