|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was synonymized subjectively with Cetiosaurus by Dollo (1889); it was synonymized subjectively with Pelorosaurus by Lydekker (1889), Lydekker (1890), Huene (1909), Romer (1956), Romer (1966), Steel (1970) and McIntosh (1990); it was synonymized subjectively with Ornithopsis by Zittel (1890).
It was assigned to Mosasauridae by Gervais (1852), Gervais (1853) and Gervais (1859); to Sauropoda by Winkler (1893); to Morosauridae by von Zittel (1911); to Sauropoda by Upchurch et al. (2004); to Camarasauridae by Sánchez-Hernández et al. (2007); and to Macronaria by Naish and Martill (2007).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.