The re-description of <i>Liaoningotitan sinensis</i> Zhou et al., 2018

<i>Liaoningotitan sinensis</i> is one of three sauropod species found in the Jehol Biota. <i>Liaoningotitan sinensis</i> is from the Lower Cretaceous Yixian Formation in Liaoning, China. The discovery of <i>Liaoningotitan sinensis</i> was an important breakthrough for researching the diversity of giant herbivorous animals in the Jehol Biota. However, the research and analysis of <i>Liaoningotitan sinensis</i> are not yet complete. This study presents a comprehensive research and analysis of <i>Liaoningotitan sinensis</i> holotype. First, the skull, vertebrae, pelvic girdle, and appendicular elements of <i>Liaoningotitan sinensis</i> holotype were carefully reexamined, leading to the discovery of mosaic evolution occurring in the skull and the identification of one new autapomorphy of humerus of <i>Liaoningotitan sinensis</i>: the attachment point of coracobrachialis muscle on the anterior surface of the proximal end of the humerus is flat. Second, the characteristics of the <i>Liaoningotitan sinensis</i> holotype and other well-preserved sauropod dinosaurs were used to reconstruct the skull of <i>Liaoningotitan sinensis</i>. Next, <i>Euhelopus zdanskyi</i> was used to reconstruct the body type of <i>Liaoningotitan sinensis</i> holotype, the result indicating that <i>Liaoningotitan sinensis</i> was approximately 10 m in length. Finally, TNT software was utilized to analyze the phylogenetic position of <i>Liaoningotitan sinensis</i>, with the result indicating that <i>Liaoningotitan sinensis</i> can be classified into the Euhelopodidae.