Detail of massive lateral processes on the left side of C18 and C19. Evidently each of these includes a pre- and postzygapophysis, which can be seen in articulation, and a dorsal process. Above that is what may be the left metapophysis of a bifid neural spine, rotated slightly towards the camera so it appears to project more laterally than it should. This strange morphology is not evident at all from in right lateral view, just conventional-looking (though highly laminated) diapophyses and parapophyses, so I may well be completely misinterpreting this.