Explore: Apatosaurus Ajax

species, Apatosaurus ajax, in 1877, and a second species, Apatosaurus louisae, was discovered and named by William H. Holland in 1916. Apatosaurus lived

Brontosaurus was not different enough from Apatosaurus to warrant a separate genus, so he created the new combination Apatosaurus excelsus for it. Riggs stated that

closely related to Diplodocus than to Apatosaurus) and Apatosaurinae (diplodocids more closely related to Apatosaurus than to Diplodocus). Originally, it

apatosaurine; Apatosaurus in 1877 and Brontosaurus in 1879. For many years, Brontosaurus was considered a taxonomic synonym of Apatosaurus after a 1903

that the dentary and teeth of Diplodocus lacustris was actually from Apatosaurus ajax. Later in 2015, it was concluded that the snout of the specimen actually

(100 ft) or more. The heaviest diplodocids, such as Supersaurus and Apatosaurus, may have weighed close to 40 tonnes. However, not all diplodocids were

of all time, including slender giants like Supersaurus, Diplodocus, Apatosaurus, and Amphicoelias. Most had very long necks and long, whip-like tails;

expansion of the scapula blade was smaller than Camarasaurus but larger than Apatosaurus. 161 cm (63 in) long as preserved, the bone is noticeably thicker than

1877, the holotypic remains of the dinosaurs Stegosaurus armatus and Apatosaurus ajax were discovered near Morrison by Arthur Lakes. The majority of these

derived than Apatosaurus. However, a cladogram from 2014 found that their group was supported, but in fact more primitive than Apatosaurus, and therefore