Apatosaurus ajax Marsh 1877 (diplodocid)

Reptilia - Saurischia - Diplodocidae

Alternative combination: Atlantosaurus ajax

Full reference: O. C. Marsh. 1877. Notice of new dinosaurian reptiles from the Jurassic formation. American Journal of Science and Arts 14:514-516

Belongs to Apatosaurus according to E. Tschopp et al. 2015

See also Chure et al. 2006, Galiano and Albersdörfer 2010, Galiano and Albersdörfer 2010, Harris 2006, Hay 1902, Johnson 1931, King 1878, Marsh 1877, Marsh 1896, Mateus 2006, McIntosh 1981, McIntosh 1990, McIntosh 1990, McIntosh 1995, Mcintosh and Berman 1975, Saegusa and Ikeda 2014, Sauvage 1880, Steel 1970, Swinton 1970, Tatarinov 1964, Tschopp and Mateus 2013, Upchurch et al. 2004, Upchurch et al. 2004 and Zittel 1890

Sister taxon: Apatosaurus louisae

Type specimen: YPM 1860, a partial skeleton. Its type locality is Lakes Quarry 10, Morrison (YPM), which is in a Kimmeridgian/Tithonian channel mudstone/sandstone in the Morrison Formation of Colorado.

Ecology: ground dwelling herbivore


• Jurassic of United States (2: Colorado collections)

Total: 2 collections each including a single occurrence

Show more details

Specimen images are retrieved through the ePANDDA API.

Click image to enlarge. Click to access iDigBio record.