Fig. 2

Fifth and sixth caudal vertebra and fifth haemal arch of Aucasaurus garridoi MCF-PVPH-236. A, the three caudal elements in lateral view; B, detail of fused centra and the haemal arch in lateral view; C, detail of the partial fusion of the neural arches in lateral view; D, detail of the partial fusion of the neural arches in dorsal view; E, detail of the fusion among the three elements in ventral view. Abbreviations: cv5, fifth caudal vertebra; cv6, sixth caudal vertebra; f, fusion of articular surfaces; ha5, fifth haemal arch; hs, contact surface for the haemal arch; ns, neural spine; prz, prezygapophysis; tp transverse process. Scale bar only for the image A: 10 cm