Dorosuchus

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Dorosuchus
Temporal range: Middle Triassic
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: Euparkeriidae (?)
Genus: Dorosuchus
Sennikov, 1989
Type species
Dorosuchus neoetus
Sennikov, 1989

Dorosuchus is an extinct genus of archosauriform that is possibly a member of the family Euparkeriidae. It lived during the Anisian stage of the Middle Triassic. Fossil material is known from Sol-Iletsk in Orenburg Oblast, Russia.[1] The type species is D. neoetus, named in 1989.[2]

Description[edit]

Dorosuchus is similar in appearance to the euparkeriid Euparkeria, sharing many features in the limbs and pelvic girdle. Most specimens are known from a single block of siltstone from a location known as the Berdyanka I locality. Limb and hip elements, sacral and caudal vertebrae, and a braincase are preserved in the block and represent four individuals. A partial illium is known from another locality.[1]

Classification[edit]

Dorosuchus was initially classified as a euparkeriid in 1989 with its first description.[2] The family Euparkeriidae is best represented by the genus Euparkeria from the Early Triassic of South Africa. Several other genera have been assigned to the family and include Turfanosuchus, Halazhaisuchus, and Wangisuchus. However, most of these genera have been excluded from the family on the basis of anatomical features such as those found in the ankle (e.g. Turfanosuchus and Wangisuchus) or are known from specimens that are too poorly preserved to offer many features that could include them within the family (e.g. Halazbaisuchus and Wangisuchus). Doubts have also been raised about the assignment of Dorosuchus to the family Euparkeriidae because of a lack of defining characteristics.[1] Despite this, Dorosuchus is usually considered to be a euparkeriid, along with the genera Euparkeria and Osmolskina.[3]

References[edit]

  1. ^ a b c Gower, D.J.; Sennikov, A.G. (2003). "Early archosaurs from Russia". In Benton, M.J.; Shishkin, M.A.; and Unwin, D.M. (eds.). The Age of Dinosaurs in Russia and Mongolia. Cambridge: Cambridge University Press. pp. 140–159. 
  2. ^ a b Sennikov, A.G. (1989). "Novyy euparkeriid (Thecodontia) iz srednego triasa Yuzhnogo Priural’ya". Paleontologicheskii Zhurnal 1989: 71–78. 
  3. ^ Borsuk−Białynicka, M.; Evans, S.E. (2009). "Cranial and mandibular osteology of the Early Triassic archosauriform Osmolskina czatkowicensis from Poland". Palaeontologia Polonica 65: 235–281.