Camarasaurus grandis Camarasaurus lentus Camarasaurus lewisi: Cathetosaurus lewisi — from the Greek "kathetos" (perpendicular) and "saurus" (lizard), for its presumed ability to stand erect on its hind legs, and for Arnold David Lewis of the Harvard Museum of Natural History — was named by Jensen in 1988 but was assigned to Camarasaurus as Camarasaurus lewisi by McIntosh eight years later. In 2013, Mateus and Tschopp described a virtually complete second specimen from Wyoming's Howe-Stephens Quarry that had fewer features in common with Camarasaurus than it did with Cathetosaurus, so the latter appears to be a valid critter afterall. The holotype, catalogued as BYU 9047, was discovered by Vivian and Daniel Jones in Pit 1 of the Dominguez-Jones Quarry in the Brushy Basin Member of Colorado's Morrison Formation. "Camarasaurus" agilis was originally named Morosaurus agilis by OC Marsh in 1889. When Osborn and Mook formalized the opinions of Osborn (1898), Riggs (1902) and Mook (1914) and sunk Morosaurus as a synonym of Camarasaurus in 1919, it was assumed that all known species went with it. However, Gilmore had already stated unequivocally in 1907 that Morosaurus agilis did not belong to Camarasaurus, and so it hung around like a bad smell for more than a century. It was renamed Smitanosaurus and reclassified as a dicraeosaurid by Whitlock and Wilson in 2020. The holotype, catalogued as USNM 5384, was discovered at Felch Quarry 1 in the Morrison Formation, near Cañon City, Colorado, in June of 1883. Camarasaurus becklesii was originally named Pelorosaurus becklesii by Gideon Mantell in 1842. It was moved to Morosaurus by Marsh in 1889 and to Camarasaurus by von Huene in 1932, then renamed Haestasaurus by Upchurch et al. in 2015. The holotype, cataloged as NHMUK R1870, was discovered in the Hastings Beds on the Isle of Wight. Camarasaurus alenquerensis was originally named Apatosaurus alenquerensis by Albert-Félix de Lapparent and Georges Zbyweski in 1957. It was assigned to Camarasaurus by McIntosh in 1990 then referred to Lourinhasaurus by Dantes et al. in 1998. In 2003, it became the lectotype of Lourinhasaurus alenquerensis as the initial holotype was renamed Dinheirosaurus lourinhanensis. Camarasaurus supremus:
Amphicoelias latus (Cope, 1877)
Camarasaurus leptodirus (Cope, 1879)
Caulodon diversidens (Cope, 1877)
Caulodon leptoganus (Cope, 1878) Camarasaurus grandis:
Apatosaurus grandis (Marsh, 1877)
Camarasaurus impar (Marsh, 1878)
Camarasaurus robustus (Marsh, 1878)
Morosaurus impar (Marsh, 1878)
Morosaurus robustus (Marsh, 1878)
Astrodon montanus (Marsh, 1896)
Pleurocoelus montanus (Marsh, 1896) Camarasaurus lentus:
Camarasaurus annae (Ellinger, 1950)
Uintasaurus douglassi (Holland, 1919) Camarasaurus agilis:
Morosaurus agilis (Marsh, 1889)