Hamititan xinjiangensis gen. et sp. nov., caudal sequence (HM V22) in right lateral view. Squares separated by letters indicate relevant anatomical details. (A) Neural arch of the 6th caudal showing pneumatic fossa, open inner small cavities, and the preserved prezygapophysis (prz) and postzygapophysis (poz). (B) Detail of the prezygapophyseal (prz) and postzygapophyseal (poz) articulations, and the upward oriented caudal transverse process (cpt). (C) Detailed of the caudal transverse process (cpt), with a smooth tuberosity at its ventral face (blue arrow). Green arrows show excavated lateral centra. (D) The pronounced ventrolateral ridges (vtrl) found at the anterior to middle caudal vertebrae. (E) Transverse processes abruptly changing from upward to downward on the 10th and 11th caudal vertebrae (blue arrow). The 10th caudal vertebra also shows a distinctive condylar rim (cr), and a developed chevron articulation facet (caf). (F) The theropod tooth that was found in association with this specimen. Scale bar: 50 cm for the whole specimen and 5 cm in (F).