Brithopus
Encyclopedia
Brithopus is an extinct genus of dinocephalia
Dinocephalia
Dinocephalia are a clade of large early therapsids that flourished during the Middle Permian, but became extinct leaving no descendants.-Description:...

n therapsid.

Dinosaurus

Dinosaurus, a junior synonym of Brithopus, was first described in 1845 by Johann Fischer von Waldheim
Johann Fischer von Waldheim
Johann Gotthelf Fischer von Waldheim was a German anatomist, entomologist and paleontologist....

, first as a species of Rhopalodon
Rhopalodon
Rhopalodon is a genus of synapsid from the Permian of Russia. It has been variously classified as a dinosaur, a dinocephalian, or another branch of Reptilia. Rhopalodon is notable for being among the first reptiles mentioned in Nature. T.H. Huxley wrote of this reptile, among others, in the...

(R. murchisoni), and assigned to its own genus by Fischer in 1847.

The name "Dinosaurus" was later used by Ludwig Rütimeyer (1856) for a dubious genus of prosauropod dinosaur
Dinosaur
Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...

, which he named Dinosaurus gresslyi. However, the name was found to be preoccupied by the therapsid. The prosauropod was re-named Gresslyosaurus ingens, and is now considered a junior synonym of Plateosaurus
Plateosaurus
Plateosaurus is a genus of plateosaurid dinosaur that lived during the Late Triassic period, around 216 to 199 million years ago, in what is now Central and Northern Europe. Plateosaurus is a basal sauropodomorph dinosaur, a so-called "prosauropod"...

.

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