Editing Apatosaurus (section)

===Reassigned species===
[[File:Einstein Apatosaurus.jpg|thumb|The most complete specimen known to date, ''A.'' sp. BYU 17096 nicknamed "Einstein"]]
* ''Apatosaurus grandis'' was named in 1877 by Marsh in the article that described ''A.{{nbsp}}ajax''. It was briefly described, figured, and diagnosed.<ref name="gilmore36"/> Marsh later mentioned it was only provisionally assigned to ''Apatosaurus'' when he reassigned it to his new genus ''Morosaurus'' in 1878.<ref name="marsh1878"/> Since ''Morosaurus'' has been considered a synonym of ''Camarasaurus'', ''C.{{nbsp}}grandis'' is the oldest-named species of the latter genus.<ref name="foster-2007"/>
* ''Apatosaurus excelsus'' was the original type species of ''Brontosaurus'', first named by Marsh in 1879. Elmer Riggs reclassified ''Brontosaurus'' as a synonym of ''Apatosaurus'' in 1903, transferring the species ''B.{{nbsp}}excelsus'' to ''A.{{nbsp}}excelsus''. In 2015, Tschopp, Mateus, and Benson argued that the species was distinct enough to be placed in its own genus, so they reclassified it back into ''Brontosaurus''.<ref name="TMB2015"/>
* ''Apatosaurus parvus'', first described from a juvenile specimen as ''Elosaurus'' in 1902 by Peterson and Gilmore, was reassigned to ''Apatosaurus'' in 1994, and then to ''Brontosaurus'' in 2015. Many other, more mature specimens were assigned to it following the 2015 study.<ref name="TMB2015"/>
* ''Apatosaurus minimus'' was originally described as a specimen of ''Brontosaurus'' sp. in 1904 by Osborn. In 1917, Henry Mook named it as its own species, ''A.{{nbsp}}minimus'', for a pair of ilia and their sacrum.<ref name="gilmore36"/><ref name="taylor2012"/><ref name="taylor&wedel2012"/> In 2012, [[Mike P. Taylor]] and [[Matt J. Wedel]] published a short abstract describing the material of ''A. minimus'', finding it hard to place among either Diplodocoidea or Macronaria. While it was placed with ''[[Saltasaurus]]'' in a phylogenetic analysis, it was thought to represent instead some form with convergent features from many groups.<ref name="taylor&wedel2012"/> The study of Tschopp et{{nbsp}}al. did find that a camarasaurid position for the taxon was supported, but noted that the position of the taxon was found to be highly variable and there was no clearly more likely position.<ref name=TMB2015/>
* ''Apatosaurus alenquerensis'' was named in 1957 by [[Albert-Félix de Lapparent]] and Georges Zbyweski. It was based on post cranial material from Portugal. In 1990, this material was reassigned to ''Camarasaurus'', but in 1998 it was given its own genus, ''[[Lourinhasaurus]]''.<ref name="Upchurch05"/> This was further supported by the findings of Tschopp et{{nbsp}}al. in 2015, where ''Lourinhasaurus'' was found to be sister to ''Camarasaurus'' and other camarasaurids.<ref name=TMB2015/>
* ''Apatosaurus yahnahpin'' was named by James Filla and Patrick Redman in 1994. Bakker made ''A.{{nbsp}}yahnahpin'' the [[holotype|type]] species of a new genus, ''[[Eobrontosaurus]]'' in 1998,<ref name="Bakker98"/> and Tschopp reclassified it as ''[[Brontosaurus yahnahpin]]'' in 2015.<ref name="TMB2015"/>