Donguz Formation

The Donguz Formation, Donguz Svita, or Donguz Rocks (Донгузские скалы) is a Middle Triassic geological formation that crops out on the right bank of Donguz River in Orenburg Oblast, Russia, across the settlement of Pervomaisky. The formation is equivalent to a biostratigraphic unit, the Donguz Gorizont. It is famous for its rich collection of the fossils of Middle Triassic tetrapods.

It is a nature monument (особо охраняемых природных территорий (ООПТ)).

Fossil content
The following fossils have been found in the Donguz Formation:


 * Temnospondyls
 * Eryosuchus antiquus, Ochev
 * E. garjainovi, Ochev
 * E. tverdochlebovi, Ochev
 * Bukobaja? sp.
 * Plagiorophus danilovi
 * Plagioscutum ochevi, Shishkin
 * Plagiosternum paraboliceps (Konzhukova)
 * Thecodonts
 * Jushatyria vjushkovi
 * Procolophonid
 * Kapes serotinus, Novikov
 * Proterosuchids
 * Sarmatosuchus ochevi, Sennikov
 * Erythrosuchids
 * Uralosaurus magnus, (Ochev)
 * Rauisuchidae
 * Dongusia colorata, Huene
 * Vjushkovisaurus berdjanensis, Ochev
 * Euparkeriidae
 * Dorosuchus neoetus, Sennikov
 * Dicynodonts
 * Kannemeyeria spp.
 * Shansiodon (Rhinodicynodon) gracile (Kalandadze)
 * Therocephalians
 * Dongusaurus schepetovi, Vyushkov
 * Nothogomphodon danilovi, Tatarinov
 * Diademodontids
 * Scalenodon boreus, Tatarinov
 * Traversodontids
 * Antecosuchus ochevi, Tatarinov
 * Therapsids
 * Calleonasus furvus
 * Cristonasus koltaeviensi
 * Elatosaurus facetus
 * Nasoplanites danilovi
 * Parvobestiola bashkiriensis
 * Rabidosaurus cristatus
 * Rhadiodromus klimovi
 * Fish
 * Ceratodus bucobaensis, C. recticristatus
 * Archosaurs
 * Dongusuchus efremovi, Sennikov