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Temporal range: Middle Jurassic, 162 Ma
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Suborder: Stegosauria
Family: Stegosauridae
Genus: Ferganastegos
Ulansky, 2014
F. callovicus
Binomial name
Ferganastegos callovicus
Ulansky, 2014

Ferganastegos is a dubious genus of stegosaur from the Middle Jurassic (Callovian) Balabansai Formation of Fergana Valley, Kyrgyzstan.[1][2]


The holotype of Ferganastegos callovicus, IGB 001, consists of four posterior dorsal vertebrae.[3] Although Averianov et al. did not consider the vertebrae diagnostic to genus, the freelance Russian dinosaur enthusiast and amateur paleontologist Roman Ulansky decided that the differences between IGB 001 and other stegosaurs were sufficient to warrant a binomial for IGB 001, Ferganastegos callovicus (Callovian roof from Fergana Valley), despite the fact he did not examine the material himself.[1] Other researchers still contend that the material is not diagnostic and that the genus is a nomen dubium.[4]


Based on present of stegosaur diet, Ferganastegos would have been a low-browsing herbivore.

See also[edit]


  1. ^ a b Ulansky, R. E., 2014. Evolution of the stegosaurs (Dinosauria; Ornithischia). Dinologia, 35 pp. [in Russian]. [DOWNLOAD PDF]http://dinoweb.narod.ru/Ulansky_2014_Stegosaurs_evolution.pdf.
  2. ^ http://zoobank.org/References/5FE177A1-0DA1-4997-83AA-57B12685676D?region=ru
  3. ^ Averianov, A.O.; Bakirov, A.A. & Martin, T. 2007. First definitive stegosaur from the Middle Jurassic of Kyrgyzstan. Paläontologische Zeitschrift 81(4):440–446.
  4. ^ Holtz, Thomas R. (1 Jan 2015). "Re: Phil Currie podcast interview + Jurassic dinosaurs". Dinosaur Mailing List.