antiquated scheme attributed by Zhao to a 1958 publication by C. C. Young (although in 1983 he had attributed it to a 1961 publication by Oskar Kuhn): the Sauropoda was divided into the primitive Bothrosauropodoidea (misspelt as "Bothrosauropodea" by Zhao) and the derived ("advanced") Homalosauropodoidea (misspelt as "Homolosauropodoidea" and "Homolosauropodea" by Zhao), which could be distinguished based on dental and vertebral characteristics. He assigned Klamelisaurus to the former. Within the "early stage" Bothrosauropodoidea, Zhao considered Klamelisaurus to be part of the Brachiosauridae, which by his definition included the modern Brachiosauridae alongside Cetiosauridae (as "Cetiosaurinae"), Camarasaurinae, and Euhelopodidae (as "Euhelopodinae"). Among these groups, he considered Klamelisaurus to be closest to Camarasaurinae due to the cervicals being longer than the dorsals; the bifid cervical and dorsal neural spines; the "well-developed" pleurocoels; the relatively short forelimb; and the fibula-femur length ratio. However, he noted that the combination of more than twelve cervicals, thirteen dorsals, five sacrals with four fused, and other characteristics in Klamelisaurus was distinct from these other groups, warranting the creation of a new subfamily. Subsequent literature has not used Zhao's taxonomy for Klamelisaurus. In the 2004 second edition of The Dinosauria, Paul Upchurch, Paul Barrett, and Peter Dodson considered Klamelisaurus to be a sauropod of uncertain phylogenetic relationships (incertae sedis), and suggested that it can be distinguished by fusion of the last three cervical neural spines. (However, in 2020, Moore and colleagues noted that it did not possess this trait.) Based on the broad, spatula-like teeth (considered by Moore and colleagues to be of questionable affiliation), the estimated presence of sixteen cervicals, the presence of five sacrals, and the forked chevrons, Upchurch and colleagues noted a resemblance between Klamelisaurus and Omeisaurus. Thus, they suggested that it could be a non-neosauropod eusauropod. Redescription In their 2020 redescription of Klamelisaurus, Moore and colleagues provided the first phylogenetic analysis of its relationships. They added Klamelisaurus to two different datasets: one used by José Carballido and colleagues in their 2015 description of Padillasaurus, and one used by Bernardo Gonzàlez Riga and colleagues in their 2018 redescription of Mendozasaurus. To both, they added various members of the Mamenchisauridae — a group that many Middle-to-Late Jurassic Chinese sauropods have been assigned to. Since previous analyses failed to find Mamenchisaurus and Omeisaurus species as unified (monophyletic) groups, their analysis focused on resolving the relationships of individual specimens rather than genera. They conducted three variants of each analysis: