A joint study by Jeffrey Wilson and Paul Upchurch, who had previously taken opposite sides in the debate, concluded that Euhelopus was closely related to titanosaurs. However, the lack of research on Mamenchisaurus-like taxa has hindered proper testing of this hypothesis, and there are several similarities between Euhelopus and Mamenchisaurus-like taxa that have not been taken into account in most analyses.
A joint investigation by Jeffrey Wilson and Paul Upchurch, who had previously held differing opinions, concluded that Euhelopus was closely related to titanosaurs. However, the absence of thorough research on Mamenchisaurus-like taxa has impeded a rigorous examination of this hypothesis, and several similarities between Euhelopus and these comparable species have not been adequately considered in most analyses.