Stan Manoukian and Vince Roucher
This gallery hosts the work of a duo of French comic artists. Although much of their site displays a wide range of comic art for various titles, the art most prominently on display is the very bizarre monster anatomies they've made, which can be seen scattered all over their website. You'll find more examples of their strange monster paintings at their myspace page.
Check out this part of the website to see some of the unusual monster art they've made.