|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Opisthocoelia
It was reranked as the order Opisthocoelia by Osborn (1904); it was synonymized subjectively with Sauropoda by Matthew (1915) and Romer (1966); it was corrected as Opisthocoela by McGrew et al. (1959); it was considered a nomen nudum by Hatcher (1903); it was synonymized subjectively with Sauropoda by Romer (1956) and Steel (1970).
It was assigned to Crocodilia by Owen (1859) and Owen (1861); to Sauropoda by Baur (1887); to Dinosauria by Cope (1883), Hay (1902) and Riggs (1903); to Dinosauria by Osborn (1904); and to Anura by McGrew et al. (1959).
|Year||Name and author|
|1861||Opisthocoelia Owen p. 300|
|1883||Opisthocoela Cope p. 98|
|1887||Opisthocoelia Baur p. 101|
|1891||Cetiosauria Baur pp. 450-451|
|1892||Cetiosauria Seeley p. 188|
|1902||Opisthocoelia Hay p. 482|
|1904||Opisthocoelia Osborn p. 114|
|1959||Opisthocoela McGrew et al. p. 130|
|1964||Cetiosauria Colbert p. 22 fig. 6|
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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.