It's Mostly Vertebrae

Spondylosoma sbsconditum, sometimes confused with Staurikosaurus pricei, is a small, herrerasaurid-like basal saurischian from the Triassic of eastern Brazil. There's ... not much to say about this, due to the crappy nature of the material, but the vertebrae, preserving early evidence for basal saurischian pneumatic fossae, helps enforce the idea that even basal ornithischians may have had postcranial pneumaticity, a condition that thus far eluded analysis of countless ornithischian skeletons.

Update: Had to fix the name: "absconticum" became "absconditum" (hidden, concealed). There's also now a little tooth I added in for fun.