The Donguz Formation, Donguz Svita, or Donguz Rocks () is a Middle Triassic geological formation that crops out on the right bank of the 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.область&objregion=Оренбургский район
It is a nature monument (особо охраняемых природных территорий (ООПТ)).Uraloved.ru
Fossil content The following fossils have been found in the Donguz Formation:
Archosaurs Dongusuchus efremovi Jushatyria vjushkovi Sarmatosuchus otschevi Vjushkovisaurus berdjanensis Archosauria indet. Bystrowianidae indet. Dicynodonts Cristonasus koltaeviensi Calleonasus furvus Elatosaurus facetus Nasoplanites danilovi Parvobestiola bashkiriensis Rabidosaurus cristatus Rhadiodromus klimovi (previously Lystrosaurus klimovi), R. mariae Rhinodicynodon gracile ?Edaxosaurus edentatus (is currently considered a synonym of Uralokannemeyeria) Uralokannemeyeria vjuschkovi (former Kannemeyeria vjuschkovi) Dicynodontia indet. Kannemeyeriiformes indet. Erythrosuchids Uralosaurus magnus Garjainia prima (previously Vjushkovia tripliocostata) Euparkeriidae Dorosuchus neoetus Pseudosuchia indet. Procolophonid Kapes majmesculae (previously K. serotinus) Rauisuchidae Dongusia colorata Traversodontidaes Scalenodon boreus Thecodontia indet. Temnospondyls Eryosuchus antiquus, E. garjainovi, E. tverdochlebovi, Eryosuchus sp. Plagiorophus danilovi, P. paraboliceps Plagioscutum ochevi Plagiosternum paraboliceps Bukobaja sp. Mastodonsauridae indet. Therocephalians Dongusaurus schepetovi Nothogomphodon danilovi Antecosuchus ochevi, A. boreus Bauriidae indet. Fish Ceratodus bucobaensis, C. recticristatus, C. jechartiensis, C. gracilis, C. orenburgensis, C. donensis, Ceratodus sp. Elasmobranchii indet.
See also Bukobay Formation Triassic land vertebrate faunachrons References