Jiangxititan is an extinct genus of somphospondylantitanosauriform dinosaur from the Late CretaceousNanxiong Formation of China. The genus contains a single species, J. ganzhouensis, known from several articulated vertebrae with ribs. Originally described as a titanosaur, Jiangxititan was later suggested to be a non-titanosaurian somphospondylan.
In 2023, Mo et al. describedJiangxititan ganzhouensis as a new genus and species of macronarian sauropod based on these fossil remains. The generic name, "Jiangxititan", combines a reference to the type locality in Jiangxi Province with the word "titan", a common suffix for giant sauropod names, referencing the pre-Olympian gods of Greek mythology. The specific name, "ganzhouensis", references the discovery of the fossil in Ganzhou City.[1]
A subsequent analysis by Han and colleagues in 2024 recovered Jiangxititan as a non-titanosaurian somphospondylan, in a polytomy with several other basal somphospondylans. Removing Jiangxititan as an unstable operational taxonomic unit in their analyses allowed for increased resolution, with more taxa recovered in the Euhelopodidae. The reduced consensus tree from their phylogenetic analyses is shown in the cladogram below:[2]
