Photographs and interpretative drawings of presacral vertebrae 22 (A) and 23 (B) of UNSM 20030 in dorsal (1), cranial (2), lateral (3), caudal (4), and ventral (5) views.

Abbreviations: ca, caudal articular surface; cf, costal fovea; cr, cranial articular surface; lc, lateral concavity; ns, neural spine; poz, postzygapophysis; prz, prezygapophysis; tp, transverse process; vp, ventral process.缩写说明：ca：尾关节面（caudal articular surface）；cf：肋凹（costal fovea）；cr：颅关节面（cranial articular surface）；lc：外侧凹陷（lateral concavity）；ns：神经棘（neural spine）；poz：后关节突（postzygapophysis）；prz：前关节突（prezygapophysis）；tp：横突（transverse process）；vp：腹突（ventral process）